harbour-core/harbour/doc/en/set.txt

/*
 *  $Id$
 */

/*
 * The following parts are Copyright of the individual authors.
 * www - http://harbour-project.org
 *
 * Copyright 1999 David G. Holm <dholm@jsd-llc.com>
 *    Documentation for: SET(), __SETCENTURY()
 *
 * Copyright 1999 April White <april@users.sourceforge.net>
 *    Documentation for: SETKEY(), HB_SetKeyGet(), HB_SETKEYSAVE(),
 *                       HB_SetKeyCheck(), SET KEY
 *
 * Copyright 1999 Chen Kedem <niki@actcom.co.il>
 *    Documentation for: __SetFunction(), SET FUNCTION
 *
 * Copyright 1999 Jose Lalin <dezac@corevia.com>
 *    Documentation for: SETTYPEAHEAD()
 *    Documentation for: __XHELP()
 *
 * Copyright 2000 Luiz Rafael Culik <Culik@sl.conex.net>
 *    Documentation for: SET WRAP,SET DEFAULT,SET MESSAGE
 *    Documentation for: SET PATH,SET INTENSITY,SET ALTERNATE
 *    Documentation for: SET CENTURY,SET DATE,SET CONSOLE
 *    Documentation for: SET EPOCH,SET PRINTER,SET FIXED
 *    Documentation for: SET BELL
 * See COPYING for licensing terms.
 *
 */

/* $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      __SETCENTURY()
 *  $CATEGORY$
 *       API
 *  $SUBCATEGORY$
 *      Environment
 *  $ONELINER$
 *      Set the Current Century
 *  $SYNTAX$
 *      __SETCENTURY([<lFlag> | <cOnOff> ] ) --> lPreviousValue
 *  $ARGUMENTS$
 *      optional <lFlag> or <cOnOff> (not case sensitive)
 *              .T. or "ON" to enable the century setting (4-digit years)
 *              .F. or "OFF" to disable the century setting (2-digit years)
 *  $RETURNS$
 *      Either the current or previous century setting as a logical value
 *  $FILES$
 *      Library is rtl
 *  $COMPLIANCE$
 *      C
 *  $END$
 */

/* $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      SET()
 *  $CATEGORY$
 *       API
 *  $SUBCATEGORY$
 *      Environment
 *  $ONELINER$
 *      Changes or evaluated enviromental settings
 *  $SYNTAX$
 *      Set(<nSet> [, <xNewSetting> [, <xOption> ] ] ) --> xPreviousSetting
 *  $ARGUMENTS$
 *      <nSet> Set Number
 *
 *      <xNewSetting> Any expression to assign a value to the setting
 *
 *      <xOption> Logical expression
 *
 *                <nSet>            <xNewSetting>          <xOption>
 *
 *              _SET_ALTERNATE   <lFlag> | <cOnOff>
 *
 *                   If enabled, QOUT() and QQOUT() write to the screen and to
 *                   a file, provided that a file has been opened or created
 *                   with _SET_ALTFILE. If disabled, which is the default,
 *                   QOUT() and QQOUT() only write to the screen (and/or to
 *                   the PRINTFILE). Defaults to disabled.
 *
 *              _SET_ALTFILE     <cFileName>             <lAdditive>
 *
 *                   When set, creates or opens file to write QOUT() and
 *                   QQOUT() output to. If <lAdditive> is TRUE and the file
 *                   already exists, the file is opened and positioned at end
 *                   of file. Otherwise, the file is created. If a file is
 *                   already opened, it is closed before the new file is
 *                   opened or created (even if it is the same file). The
 *                   default file extension is ".txt". There is no default
 *                   file name. Call with an empty string to close the file.
 *
 *              _SET_AUTOPEN     <lFlag> | <cOnOff>
 *
 *                   TODO: Document
 *
 *              _SET_AUTORDER    <lFlag> | <cOnOff>
 *
 *                   TODO: Document
 *
 *              _SET_AUTOSHARE   <lFlag> | <cOnOff>
 *
 *                   TODO: Document
 *
 *              _SET_BELL        <lFlag> | <cOnOff>
 *
 *                   When enabled, the bell sounds when the last position of
 *                   a GET is reached and/or when a GET validation fails.
 *                   Disabled by default.
 *
 *              _SET_CANCEL      <lFlag> | <cOnOff>
 *
 *                   When enabled, which is the default, pressing Alt+C or
 *                   Ctrl+Break terminates the program. When disabled, both
 *                   keystrokes can be read by INKEY(). Note: SET KEY has
 *                   precedence over SET CANCEL.
 *
 *              _SET_COLOR       <cColorSet>
 *
 *                   Sets the current color scheme, using color pairs in the
 *                   sequence "<standard>,<enhanced>,<border>,<background>,
 *                   <unselected>". Each color pair uses the format
 *                   "<foreground>/<background>". The color codes are space
 *                   or "N" for black, "B" for blue, "G" for green, "BG" for
 *                   Cyan, "R" for red, "RB" for magenta, "GR" for brown, "W"
 *                   for white, "N+" for gray, "B+" for bright blue, "G+" for
 *                   bright green, "BG+" for bright cyan, "R+" for bright red,
 *                   "RB+" for bright magenta, "GR+" for yellow, and "W+" for
 *                   bright white. Special codes are "I" for inverse video,
 *                   "U" for underline on a monochrome monitor (blue on a
 *                   color monitor), and "X" for blank. The default color is
 *                   "W/N,N/W,N,N,N/W".
 *
 *              _SET_CONFIRM     <lFlag> | <cOnOff>
 *
 *                   If enabled, an exit key must be pressed to leave a GET.
 *                   If disabled, which is the default, typing past the end
 *                   will leave a GET.
 *
 *              _SET_CONSOLE     <lFlag> | <cOnOff>
 *
 *                   If enabled, which is the default, all screen output goes
 *                   to the screen. When disabled, screen output is suppressed
 *                   (Note: This setting does not affect OUTSTD() or OUTERR()).
 *
 *              _SET_CURSOR      <nCursorType>
 *
 *                   If enabled, which is the default, the cursor is displayed
 *                   on screen. If disabled, the screen cursor is hidden.
 *
 *              _SET_DATEFORMAT  <cDateFormat>
 *
 *                   Sets the default date format for display, date input, and
 *                   date conversion. Defaults to American ("mm/dd/yy"). Other
 *                   formats include ANSI ("yy.mm.dd"), British ("dd/mm/yy"),
 *                   French ("dd/mm/yy"), German ("dd.mm.yy"), Italian
 *                   ("dd-mm-yy"), Japan ("yy/mm/dd"), and USA ("mm-dd-yy").
 *                   SET CENTURY modifies the date format. SET CENTURY ON
 *                   replaces the "y"s with "YYYY". SET CENTURY OFF replaces
 *                   the "y"s with "YY".
 *
 *              _SET_DEBUG       <lStatus>
 *
 *                   When set to .t., pressing Alt+D activates the debugger.
 *                   When set to .f., which is the default, Alt+D can be read
 *                   by INKEY(). (Also affected by AltD(1) and AltD(0))
 *
 *              _SET_DECIMALS    <nNumberOfDecimals>
 *
 *                   Sets the number of decimal digits to use when displaying
 *                   printing numeric values when SET FIXED is ON. Defaults to
 *                   2. If SET FIXED is OFF, then SET DECIMALS is only used to
 *                   determine the number of decimal digits to use after using
 *                   EXP(), LOG(), SQRT(), or division. Other math operations
 *                   may adjust the number of decimal digits that the result
 *                   will display. Note: This never affects the precision of
 *                   a number. Only the display format is affected.
 *
 *              _SET_DEFAULT     <cDefaultDirectory>
 *
 *                   Sets the default directory in which to open, create and
 *                   check for files. Defaults to current directory (blank).
 *
 *              _SET_DELETED     <lFlag> | <cOnOff>
 *
 *                   If enabled, deleted records will be processed. If
 *                   disabled, which is the default, deleted records will
 *                   be ignored.
 *
 *              _SET_DELIMCHARS  <cDelimiters>
 *
 *                   Sets the GET delimiter characters. Defaults to "::".
 *
 *              _SET_DELIMITERS  <lFlag> | <cOnOff>
 *
 *                   If enabled, GETs are delimited on screen. If disabled,
 *                   which is the default, no GET delimiters are used.
 *
 *              _SET_DEVICE      <cDeviceName>
 *
 *                   Selects the output device for DEVOUT(). When set to
 *                   "PRINTER", all output is sent to the printer device or
 *                   file set by _SET_PRINTFILE. When set to anything else,
 *                   all output is sent to the screen. Defaults to "SCREEN".
 *
 *              _SET_EOF         <lFlag> | <cOnOff>
 *
 *                   Defaults to FALSE on UN*X, but defaults to TRUE on
 *                   everything else. If set to FALSE, then CHR(26) does not
 *                   get written when using COPY TO DELIMITED, COPY TO SDF,
 *                   or when closing any of the various text files that are
 *                   created using various SET values.
 *                   [This is a Harbour extension]
 *
 *              _SET_EPOCH       <nYear>
 *
 *                   Determines how to handle the conversion of 2-digit years
 *                   to 4 digit years. When a 2-digit year is greater than or
 *                   equal to the year part of the epoch, the century part of
 *                   the epoch is added to the year. When a 2-digit year is
 *                   less than the year part of the epoch, the century part
 *                   of the epoch is incremented and added to the year. The
 *                   default epoch is 1900, which converts all 2-digit years
 *                   to 19xx. Example: If the epoch is set to 1950, 2-digit
 *                   years in the range from 50 to 99 get converted to 19xx
 *                   and 2-digit years in the range 00 to 49 get converted
 *                   to 20xx.
 *
 *              _SET_ESCAPE      <lFlag> | <cOnOff>
 *
 *                   When enabled, which is the default, pressing Esc will
 *                   exit a READ. When disabled, pressing Esc during a READ
 *                   is ignored, unless the Esc key has been assigned to a
 *                   function using SET KEY.
 *
 *              _SET_EVENTMASK   <nEventCodes>
 *
 *                   Determines which events INKEY() will respond to.
 *                   INKEY_MOVE allows mouse movement events. INKEY_LDOWN
 *                   allows the left mouse button down click. INKEY_LUP
 *                   allows the left mouse button up click. INKEY_RDOWN
 *                   allows the right mouse button down click. INKEY_RUP
 *                   allows the right mouse button up clock. INKEY_KEYBOARD
 *                   allows keyboard keystrokes. INKEY_ALL allows all of the
 *                   preceding events. Events may be combined (e.g., using
 *                   INKEY_LDOWN + INKEY_RUP will allow left mouse button
 *                   down clicks and right mouse button up clicks). The
 *                   default is INKEY_KEYBOARD.
 *
 *              _SET_EXACT       <lFlag> | <cOnOff>
 *
 *                   When enabled, all string comparisons other than "=="
 *                   exclude trailing spaces when checking for equality.
 *                   When disabled, which is the default, all string
 *                   comparisons other than "==" treat two strings as
 *                   equal if the right hand string is "" or if the right
 *                   hand string is shorter than or the same length as the
 *                   left hand string and all of the characters in the right
 *                   hand string match the corresponding characters in the
 *                   left hand string.
 *
 *              _SET_EXCLUSIVE   <lFlag> | <cOnOff>
 *
 *                   When enabled, which is the default, all database files
 *                   are opened in exclusive mode. When disabled, all
 *                   database files are opened in shared mode. Note: The
 *                   EXCLUSIVE and SHARED clauses of the USE command can be
 *                   used to override this setting.
 *
 *              _SET_EXIT        <lFlag> | <cOnOff>
 *
 *                   Toggles the use of Uparrow and Dnarrow as READ exit keys.
 *                   Specifying true (.T.) enables them as exit keys, and
 *                   false (.F.) disables them. Used internally by the
 *                   ReadExit() function.
 *
 *              _SET_EXTRA       <lFlag> | <cOnOff>
 *
 *                   QUESTION: What is this for?
 *                   It does not affect _SET_EXTRAFILE in CA-Cl*pper!
 *
 *              _SET_EXTRAFILE   <cFileName>             <lAdditive>
 *
 *                   When set, creates or opens file to write QOUT() and
 *                   QQOUT() output to. If <lAdditive> is TRUE and the file
 *                   already exists, the file is opened and positioned at end
 *                   of file. Otherwise, the file is created. If a file is
 *                   already opened, it is closed before the new file is
 *                   opened or created (even if it is the same file). The
 *                   default file extension is ".prn". There is no default
 *                   file name. Call with an empty string to close the file.
 *
 *              _SET_FIXED       <lFlag> | <cOnOff>
 *
 *                   When enabled, all numeric values will be displayed
 *                   and printed with the number of decimal digits set
 *                   by SET DECIMALS, unless a PICTURE clause is used.
 *                   When disabled, which is the default, the number
 *                   of decimal digits that are displayed depends upon
 *                   a variety of factors. See _SET_DECIMALS for more.
 *
 *              _SET_INSERT      <lFlag> | <cOnOff>
 *
 *                   When enabled, characters typed in a GET or MEMOEDIT
 *                   are inserted. When disabled, which is the default,
 *                   characters typed in a GET or MEMOEDIT overwrite.
 *                   Note: This setting can also be toggled between on and
 *                   off by pressing the Insert key during a GET or MEMOEDIT.
 *
 *              _SET_INTENSITY   <lFlag> | <cOnOff>
 *
 *                   When enabled, which is the default, GETs and PROMPTs
 *                   are displayed using the enhanced color setting. When
 *                   disabled, GETs and PROMPTs are displayed using the
 *                   standard color setting.
 *
 *              _SET_LANGUAGE    <cLanguageID>
 *
 *                   Specifies the language to be used for Harbour messages.
 *                   [This is a Harbour extension]
 *
 *              _SET_MARGIN      <nColumns>
 *
 *                   Sets the left margin for all printed output. The default
 *                   value is 0. Note: PCOL() reflects the printer's column
 *                   position including the margin (e.g., SET MARGIN TO 5
 *                   followed by DEVPOS(5, 10) makes PCOL() return 15).
 *
 *              _SET_MBLOCKSIZE <nMemoBlockSize>
 *
 *                   TODO: Document
 *
 *              _SET_MCENTER     <lFlag> | <cOnOff>
 *
 *                   If enabled, display PROMPTs centered on the MESSAGE row.
 *                   If disabled, which is the default, display PROMPTS at
 *                   column position 0 on the MESSAGE row.
 *
 *              _SET_MESSAGE     <nRow>
 *
 *                   If set to 0, which is the default, PROMPTs are always
 *                   suppressed. Otherwise, PROMPTs are displayed on the
 *                   set row. Note: It is not possible to display prompts
 *                   on the top-most screen row, because row 0 is reserved
 *                   for the SCOREBOARD, if enabled.
 *
 *              _SET_MFILEEXT    <cMemoFileExt>
 *
 *                   TODO: Document
 *
 *              _SET_OPTIMIZE    <lFlag> | <cOnOff>
 *
 *                   TODO: Document
 *
 *              _SET_PATH        <cDirectories>
 *
 *                   Specifies a path of directories to search through to
 *                   locate a file that can't be located in the DEFAULT
 *                   directory. Defaults to no path (""). Directories must
 *                   be separated by a semicolon (e.g., "C:\data;C:\more").
 *
 *              _SET_PRINTER     <lFlag> | <cOnOff>
 *
 *                   If enabled, QOUT() and QQOUT() write to the screen and to
 *                   a file, provided that a file has been opened or created
 *                   with _SET_ALTFILE. If disabled, which is the default,
 *                   QOUT() and QQOUT() only write to the screen (and/or to
 *                   the ALTFILE).
 *
 *              _SET_PRINTFILE   <cFileName>             <lAdditive>
 *
 *                   When set, creates or opens file to write QOUT(), QQOUT()
 *                   and DEVOUT() output to. If <lAdditive> is TRUE and the
 *                   file already exists, the file is opened and positioned
 *                   at end of file. Otherwise, the file is created. If a
 *                   file is already opened, it is closed before the new file
 *                   is opened or created (even if it is the same file). The
 *                   default file extension is ".prn". The default file name
 *                   is "PRN", which maps to the default printer device. Call
 *                   with an empty string to close the file.
 *
 *              _SET_SCOREBOARD  <lFlag> | <cOnOff>
 *
 *                   When enabled, which is the default, READ and MEMOEDIT
 *                   display status messages on screen row 0. When disabled,
 *                   READ and MEMOEDIT status messages are suppressed.
 *
 *              _SET_SCROLLBREAK <lFlag> | <cOnOff>
 *
 *                   QUESTION: What is this flag for?
 *
 *              _SET_SOFTSEEK    <lFlag> | <cOnOff>
 *
 *                   When enabled, a SEEK that fails will position the record
 *                   pointer to the first key that is higher than the sought
 *                   after key or to LASTREC() + 1 if there is no higher key.
 *                   When disabled, which is the default, a SEEK that fails
 *                   will position the record pointer to LASTREC()+1.
 *
 *              _SET_STRICTREAD  <lFlag> | <cOnOff>
 *
 *                   TODO: Document
 *
 *              _SET_TYPEAHEAD   <nKeyStrokes>
 *
 *                   Sets the size of the keyboard typeahead buffer. Defaults
 *                   to 50. The minimum is 16 and the maximum is 4096.
 *
 *              _SET_UNIQUE      <lFlag> | <cOnOff>
 *
 *                   When enabled, indexes are not allowed to have duplicate
 *                   keys. When disabled, indexes are allowed duplicate keys.
 *
 *              _SET_VIDEOMODE   <nValue>
 *
 *                   TODO: Document
 *
 *              _SET_WRAP        <lFlag> | <cOnOff>
 *
 *                   When enabled, lightbar menus can be navigated from the
 *                   last position to the first and from the first position
 *                   to the last. When disabled, which is the default, there
 *                   is a hard stop at the first and last positions.
 *  $RETURNS$
 *      SET() The current or previous setting
 *  $FILES$
 *      Library is rtl
 *  $COMPLIANCE$
 *      C
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      __SetFunction()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Events
 *  $ONELINER$
 *      Assign a character string to a function key
 *  $SYNTAX$
 *      __SetFunction( <nFunctionKey>, [<cString>] ) --> NIL
 *  $ARGUMENTS$
 *      <nFunctionKey> is a number in the range 1..40 that represent the
 *      function key to be assigned.
 *
 *      <cString> is a character string to set. If <cString> is not
 *      specified, the function key is going to be set to NIL releasing by
 *      that any previous __SetFunction() or SETKEY() for that function.
 *  $RETURNS$
 *      __SetFunction() always return NIL.
 *  $DESCRIPTION$
 *      __SetFunction() assign a character string with a function key, when
 *      this function key is pressed, the keyboard is stuffed with this
 *      character string. __SetFunction() has the effect of clearing any
 *      SETKEY() previously set to the same function number and vice versa.
 *
 *      <table>
 *      nFunctionKey    Key to be set
 *
 *         1 .. 12      F1 .. F12
 *        13 .. 20      Shift-F3 .. Shift-F10
 *        21 .. 30      Ctrl-F1 .. Ctrl-F10
 *        31 .. 40      Alt-F1 .. Alt-F10
 *      </table>
 *
 *      SET FUNCTION command is preprocessed into __SetFunction() function
 *      during compile time.
 *  $EXAMPLES$
 *      // Set F1 with a string
 *      CLS
 *      __SetFunction( 1, "I Am Lazy" + CHR( 13 ) )
 *      cTest := SPACE( 20 )
 *      @ 10, 0 SAY "type something or F1 for lazy mode " GET cTest
 *      READ
 *      ? cTest
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      Harbour use 11 and 12 to represent F11 and F12, while CA-Cl*pper use
 *      11 and 12 to represent Shift-F1 and Shift-F2.
 *  $PLATFORMS$
 *      All
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *      INKEY(),SETKEY(),__Keyboard(),SET KEY
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *     SET FUNCTION
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Assign a character string to a function key
 *  $SYNTAX$
 *      SET FUNCTION <nFunctionKey> TO [<cString>]
 *  $ARGUMENTS$
 *      <nFunctionKey> is a number in the range 1..40 that represent the
 *      function key to be assigned.
 *
 *      <cString> is a character string to set. If <cString> is not
 *      specified, the function key is going to be set to NIL releasing by
 *      that any previous Set Function or SETKEY() for that function.
 *  $DESCRIPTION$
 *        Set Function assign a character string with a function key, when
 *      this function key is pressed, the keyboard is stuffed with this
 *      character string. Set Function has the effect of clearing any
 *      SETKEY() previously set to the same function number and vice versa.
 *
 *      <table>
 *      nFunctionKey    Key to be set
 *
 *         1 .. 12      F1 .. F12
 *        13 .. 20      Shift-F3 .. Shift-F10
 *        21 .. 30      Ctrl-F1 .. Ctrl-F10
 *        31 .. 40      Alt-F1 .. Alt-F10
 *      </table>
 *
 *      SET FUNCTION command is preprocessed into __SetFunction() function
 *      during compile time.
 *  $EXAMPLES$
 *      // Set F1 with a string
 *      CLS
 *      Set Function  1 to  "I Am Lazy" + CHR( 13 )
 *      cTest := SPACE( 20 )
 *      @ 10, 0 SAY "type something or F1 for lazy mode " GET cTest
 *      READ
 *      ? cTest
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      Harbour use 11 and 12 to represent F11 and F12, while CA-Cl*pper use
 *      11 and 12 to represent Shift-F1 and Shift-F2.
 *  $PLATFORMS$
 *      All
 *  $SEEALSO$
 *      INKEY(),SETKEY(),__Keyboard()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      SETKEY()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Events
 *  $ONELINER$
 *      Assign an action block to a key
 *  $SYNTAX$
 *      SETKEY( <anKey> [, <bAction> [, <bCondition> ] ] )
 *  $ARGUMENTS$
 *      <anKey> is either a numeric key value, or an array of such values

 *      <bAction> is an optional code-block to be assigned

 *      <bCondition> is an optional condition code-block
 *  $RETURNS$
 *      Current assigned action-block
 *  $DESCRIPTION$
 *      The SetKey() function returns the current code-block assigned to a
 *      key when called with only the key value.  If the action block (and
 *      optionally the condition block) are passed, the current block is
 *      returned, and the new code block and condition block are stored.
 *      A group of keys may be assigned the same code block/condition block
 *      by using an array of key values in place on the first parameter.
 *  $EXAMPLES$
 *      local bOldF10 := setKey( K_F10, {|| Yahoo() } )
 *      ... // some other processing
 *      SetKey( K_F10, bOldF10 )
 *      ... // some other processing
 *      bBlock := SetKey( K_SPACE )
 *      if bBlock != NIL ...
 *
 *      // make F10 exit current get, but only if in a get - ignores other
 *      // wait-states such as menus, achoices, etc...
 *      SetKey( K_F10, {|| GetActive():State := GE_WRITE },;
 *       {|| GetActive() != NIL } )
 *  $TESTS$
 *      None definable
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      SETKEY() is mostly CA-Cl*pper compliant. The only difference is the
 *      addition of the condition code-block parameter, allowing set-keys to
 *      be conditionally turned off or on.  This condition-block cannot be
 *      returned once set - see SetKeyGet()
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *      HB_SETKEYSAVE()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      HB_SetKeyGet()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Events
 *  $ONELINER$
 *      Determine a set-key code block and condition-block
 *  $SYNTAX$
 *      HB_SETKEYGET( <nKey> [, <bConditionByRef> ] )
 *  $ARGUMENTS$
 *      <anKey> is an numeric key value

 *      <bConditionByRef> is an optional return-parameter
 *  $RETURNS$
 *      Current assigned action-block
 *  $DESCRIPTION$
 *      The HB_SetKeyGet() function returns the current code-block assigned to
 *      a key, and optionally assignes the condition-block to the
 *      return-parameter
 *  $EXAMPLES$
 *      local bOldF10, bOldF10Cond
 *      bOldF10 := HB_SetKeyGet( K_F10, @bOldF10Cond )
 *      ... // some other processing
 *      SetKey( K_F10, bOldF10, bOldF10Cond )
 *  $TESTS$
 *      See test code above
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      H
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *      SETKEY(),HB_SETKEYSAVE(),HB_SETKEYCHECK()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *     HB_SETKEYSAVE()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Events
 *  $ONELINER$
 *     Returns a copy of internal set-key list, optionally overwriting
 *  $SYNTAX$
 *     HB_SETKEYSAVE( [ <OldKeys> ] )
 *  $ARGUMENTS$
 *     <OldKeys> is an optional set-key list from a previous call to
 *     HB_SetKeySave(), or NIL to clear current set-key list
 *  $RETURNS$
 *     Current set-key list
 *  $DESCRIPTION$
 *     HB_SetKeySave() is designed to act like the set() function which
 *     returns the current state of an environment setting, and optionally
 *     assigning a new value.  In this case, the "environment setting" is the
 *     internal set-key list, and the optional new value is either a value
 *     returned from a previous call to SetKeySave() - to restore that list,
 *     or the value of NIL to clear the current list.
 *  $EXAMPLES$
 *     local aKeys := HB_SetKeySave( NIL )  // removes all current set=keys
 *     ... // some other processing
 *     HB_SetKeySave( aKeys )
 *  $TESTS$
 *     None definable
 *  $STATUS$
 *     R
 *  $COMPLIANCE$
 *     H
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *     SETKEY()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      HB_SetKeyCheck()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Events
 *  $ONELINER$
 *      Impliments common hot-key activation code
 *  $SYNTAX$
 *      HB_SetKeyCheck( <nKey> [, <p1> ][, <p2> ][, <p3> ] )
 *  $ARGUMENTS$
 *      <nKey> is a numeric key value to be tested code-block, if executed

 *      <p1>..<p3> are optional parameters that will be passed to the code-block
 *  $RETURNS$
 *      True if there is a hot-key associated with <nKey> and it was executed;
 *      otherwise False
 *      If there is a hot-key association (before checking any condition):
 *      - if there is a condition-block, it is passed one parameter - <nKey>
 *      - when the hot-key code-block is called, it is passed 1 to 4 parameters,
 *      depending on the parameters passed to HB_SetKeyCheck().  Any
 *      parameters so passed are directly passed to the code-block, with an
 *      additional parameter being <nKey>
 *  $DESCRIPTION$
 *      HB_SetKeyCheck() is intended as a common interface to the SetKey()
 *      functionality for such functions as ACHOICE(), DBEDIT(), MEMOEDIT(),
 *      ACCEPT, INPUT, READ, and WAIT
 *  $EXAMPLES$
 *      // within ReadModal()
 *      if HB_SetKeyCheck( K_ALT_X, GetActive() )
 *      ... // some other processing
 *      endif
 *      // within TBrowse handler
 *      case HB_SetKeyCheck( nInkey, oTBrowse )
 *        return
 *      case nInKey == K_ESC
 *      ... // some other processing
 *  $TESTS$
 *      None definable
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      H
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *      SETKEY(),HB_SETKEYSAVE()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET KEY
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Assign an action block to a key
 *  $SYNTAX$
 *      SET KEY   <anKey> to p<bAction>] [when  <bCondition> ]  )
 *  $ARGUMENTS$
 *      <anKey> is either a numeric key value, or an array of such values

 *      <bAction> is an optional code-block to be assigned

 *      <bCondition> is an optional condition code-block
 *  $DESCRIPTION$
 *      The Set Key Command function is translated to the SetKey() function
 *      witch returns the current code-block assigned to a
 *      key when called with only the key value.  If the action block (and
 *      optionally the condition block) are passed, the current block is
 *      returned, and the new code block and condition block are stored.
 *      A group of keys may be assigned the same code block/condition block
 *      by using an array of key values in place on the first parameter.
 *  $EXAMPLES$
 *      local bOldF10 := setKey( K_F10, {|| Yahoo() } )
 *      ... // some other processing
 *      Set Key  K_F10 to  bOldF10)
 *      ... // some other processing
 *      bBlock := SetKey( K_SPACE )
 *      if bBlock != NIL ...
 *
 *      // make F10 exit current get, but only if in a get - ignores other
 *      // wait-states such as menus, achoices, etc...
 *      SetKey( K_F10, {|| GetActive():State := GE_WRITE },;
 *       {|| GetActive() != NIL } )
 *  $TESTS$
 *      None definable
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      SET KEY is mostly CA-Cl*pper compliant. The only difference is the
 *      addition of the condition code-block parameter, allowing set-keys to
 *      be conditionally turned off or on.  This condition-block cannot be
 *      returned once set - see SetKeyGet()
 *  $SEEALSO$
 *      HB_SETKEYSAVE()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      SETTYPEAHEAD()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Environment
 *  $ONELINER$
 *      Sets the typeahead buffer to given size.
 *  $SYNTAX$
 *      SETTYPEAHEAD( <nSize> ) --> <nPreviousSize>
 *  $ARGUMENTS$
 *      <nSize> is a valid typeahead size.
 *  $RETURNS$
 *      <nPreviousSize> The previous state of _SET_TYPEAHEAD
 *  $DESCRIPTION$
 *      This function sets the typeahead buffer to a valid given size as is
 *      Set( _SET_TYPEAHEAD ) where used.
 *  $EXAMPLES$
 *      // Sets typeahead to 12
 *      SetTypeahead( 12 )
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $FILES$
 *      Library is rtl
 *  $SEEALSO$
 *      __ACCEPT(),__INPUT()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Function
 *  $NAME$
 *      __XHELP()
 *  $CATEGORY$
 *      API
 *  $SUBCATEGORY$
 *      Internal
 *  $ONELINER$
 *      Determines whether a Help() user defined function exists.
 *  $SYNTAX$
 *      __XHELP() --> <xValue>
 *  $ARGUMENTS$
 *      None
 *  $RETURNS$
 *      This function returns aleatory values.
 *  $DESCRIPTION$
 *      This is an internal undocumented CA-Cl*pper function, which will
 *      try to call the user defined function HELP() if it is defined
 *      in the current application. This is the default SetKey() handler
 *      for the F1 key.
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C52U
 *  $FILES$
 *      Library is rtl
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET DEFAULT
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Establishes the Harbour search drive and directory.
 *  $SYNTAX$
 *      SET DEFAULT TO [<cPath>]
 *  $ARGUMENTS$
 *      <cPath> Drive and/or path.
 *  $DESCRIPTION$
 *      This command changes the drive and directory used for reading and
 *      writting database,index,memory, and alternate files. Specifying no
 *      parameters with this command will default the operation to the
 *      current logged drive and directory.
 *  $EXAMPLES$
 *      SET DEFAULT to C:\temp
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET PATH,CURDIR(),SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET WRAP
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle wrapping the PROMPTs in a menu.
 *  $SYNTAX$
 *      SET WRAP on | OFF | (<lWrap>
 *  $ARGUMENTS$
 *      <lWrap> Logical expression for toggle
 *  $DESCRIPTION$
 *      This command toggles the highlighted bars in a @...PROMPT command
 *      to wrap around in a bottom-to-top and top-to-bottom manner. If the
 *      value of the logical expression <lWrap> is a logical false (.F.),
 *      the wrapping mode is set OFF; otherwise,it is set ON.
 *  $EXAMPLES$
 *      See Tests/menutest.prg
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      @...PROMPT,MENU TO
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET MESSAGE
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Extablishes a message row for @...PROMPT command
 *  $SYNTAX$
 *      SET MESSAGE TO [<nRow> [CENTER]]
 *  $ARGUMENTS$
 *      <nRow> Row number to display the message
 *  $DESCRIPTION$
 *      This command is designed to work in conjuntion with the MENU TO and
 *      @...PROMPT commands. With this command, a row number between 0 and
 *      MAXROW() may be specified in <nRow>. This establishes the row on
 *      witch any message associated with an @...PROMPT command will apear.

 *      If the value of <nRow> is 0, all messages will be supressed.
 *      All messaged will be left-justifies unless the CENTER clause is
 *      used. In this case, the individual messages in each @...PROMPT command
 *      will be centered at the designated row (unless <nRow> is 0). All
 *      messages are independent; therefore, the screen area is cleared out
 *      by the centered message will vary based on the length of each
 *      individual message.

 *      Specifying no parameters with this command set the row value to 0,
 *      witch suppresses all messages output.
 *      The British spelling of CENTRE is also supported.
 *  $EXAMPLES$
 *      See Tests/menutest.prg
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET(),SET WRAP,@...PROMPT,MENU TO
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET PATH
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Specifies a search path for opening files
 *  $SYNTAX$
 *      SET PATH TO [<cPath>]
 *  $ARGUMENTS$
 *      <cPath> Search path for files
 *  $DESCRIPTION$
 *      This command specifies the search path for files required by most
 *      commands and functions not found in the current drive and directory.
 *      This pertains primarily, but not exclusively, to databases, indexes,
 *      and memo files, as well as to memory, labels and reports files. The
 *      search hirarchy is: 1 Current drive and directory, 2 The SET DEFAULT
 *      path; 3 The SET PATH path.
 *  $EXAMPLES$
 *      SET PATH TO C:\harbour\test
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DEFAULT,CURDIR(),SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET INTENSITY
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggles the enhaced display of PROMPT's and GETs.
 *  $SYNTAX$
 *      SET INTENSITY  ON | off | (<lInte>)
 *  $ARGUMENTS$
 *      <lInte> Logical expression for toggle command
 *  $DESCRIPTION$
 *      This command set the field input color and @...PROMPT menu color
 *      to either highlighted (inverse video) or normal color. The default
 *      condition is ON (highlighted).
 *  $EXAMPLES$
 *      SET INTENSITY ON
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      @...GET,@...PROMPT,@...SAY,SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET ALTERNATE
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle and echos output to an alternate file
 *  $SYNTAX$
 *      SET ALTERNATE to <cFile> [ADDITIVE]
 *      SET ALTERNATE  on | OFF | (<lAlter>)
 *  $ARGUMENTS$
 *      <cFile> Name of alternate file.
 *
 *      <lAlter> Logical expression for toggle
 *  $DESCRIPTION$
 *      This command toggles and output console information to the alternate
 *      file <cFile>, provided that the command is toggled on or the condition
 *      <lAlter> is set to a logical true (.T.). If <cFile> does not has a
 *      file extension, .txt will be assumed. The file name may optionally
 *      have a drive letter and/or directory path. If none is speficied, the
 *      current drive and directory will be used.
 *      If the ALTERNATE file is created but no ALTERNATE ON command is
 *      issued, nothing will be echoed to the file.
 *      If ADDITIVE clause is used, then the information will be appended
 *      to the existing alternate file. Otherwise, a new file will be created
 *      with the specified name (or an existing one will be overwritten) and
 *      the information will be appended to the file. The default is to create
 *      a new file.
 *      A SET ALTERNATE TO command will close the alternate file
 *  $EXAMPLES$
 *      SET ALTERNATE TO test.txt
 *      SET ALTERNATE ON
 *      ? 'Harbour'
 *      ? "is"
 *      ? "Power"
 *      SET ALTERNATE TO
 *      SET ALTERNATE OFF
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      CLOSE,SET PRINTER,SET CONSOLE,SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET CENTURY
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle the century digits in all dates display
 *  $SYNTAX$
 *      SET CENTURY on | OFF | (<lCent>)
 *  $ARGUMENTS$
 *      <lCent> Logical expression for toggle
 *  $DESCRIPTION$
 *      This command allows the input and display of dates with the century
 *      prefix. It will be in the standart MM/DD/YYYY format unless specified
 *      by the SET DATE command or SET() function. If <lCent> is a logical
 *      true (.T.), the command will be set on; otherwise, the command will
 *      be set off
 *  $EXAMPLES$
 *      SET CENTURY ON
 *      ? DATE()
 *      SET CENTURY OFF
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DATE,SET EPOCH,CTOD(),DATE(),DTOC(),SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET DATE
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Assigns a date format or chooses a predefined date data set.
 *  $SYNTAX$
 *      SET DATE FORMAT [TO] <cFormat>
 *
 *      SET DATE [TO] [ANSI / BRITISH / FRENCH / GERMAN / ITALIAN / JAPAN / USA / AMERICAN]
 *  $ARGUMENTS$
 *      <cFormat> Keyword for date format
 *  $DESCRIPTION$
 *      This command sets the date format for function display purposes.
 *      If specified, <cFormat> may be a customized date format in which the
 *      letters d, m and y may be used to desing a date format. The default
 *      is an AMERICAN date format; specifying no parameters will set the
 *      date format to AMERICAN. Below is a table of the varius predefined
 *      dates formats.
 *
 *      <table>
 *       Syntax         Date Format
 *       ANSI           yy.mm.dd
 *       BRITISH        dd/mm/yy
 *       FRENCH         dd/mm/yy
 *       GERMAN         dd.mm.yy
 *       ITALIAN        dd-mm-yy
 *       JAPAN          yy.mm.dd
 *       USA            mm-dd-yy
 *       AMERICAN       mm/dd/yy
 *      </table>
 *  $EXAMPLES$
 *      SET DATE JAPAN
 *      ? DATE()
 *      SET DATE GERMAN
 *      ? Date()
 *  $TESTS$
 *      See tests/dates.prg
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DATE,SET EPOCH,CTOD(),DATE(),DTOC(),SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET EPOCH
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Specify a base year for interpreting dates
 *  $SYNTAX$
 *      SET EPOCH TO <nEpoch>
 *  $ARGUMENTS$
 *      <nEpoch> Base Century.
 *  $DESCRIPTION$
 *      This command sets the base year value for dates that have only two
 *      digits. The default setting is 1900. Dates between 01/01/0100 and
 *      12/31/2999 are fully supported.
 *  $EXAMPLES$
 *      SET EPOCH TO 2000
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DATE,SET CENTURY,CTOD(),DATE(),DTOC(),SET()
 *  $END$
 */
/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET FIXED
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Set the number of decimal position to be displayed
 *  $SYNTAX$
 *      SET FIXED on | OFF | (<lFixed>)
 *  $ARGUMENTS$
 *      <lFixed> Logical expression for toggle
 *  $DESCRIPTION$
 *      This command activates a system wide fixed placement of decimals
 *      places shown for all numeric outputs. If the value of <lFixed> is
 *      a logical true (.T.), FIXED will be turned ON; otherwise it will be
 *      turned OFF.
 *
 *      When SET DECIMALS OFF is used, the following rules apply to the number
 *      of decimal placed displayed.
 *
 *      <table>
 *       Addition         Same as operand with the greatest number of decimal digits
 *       Subraction       Same as operand with the greatest number of decimal digits
 *       Multiplication   Sum of operand decimal digits
 *       Division         Determined by SET DECIMAL TO
 *       Exponential      Determined by SET DECIMAL TO
 *       LOG()            Determined by SET DECIMAL TO
 *       EXP()            Determined by SET DECIMAL TO
 *       SQRT()           Determined by SET DECIMAL TO
 *       VAL()            Determined by SET DECIMAL TO
 *      </table>
 *  $EXAMPLES$
 *      SET FIXED ON
 *      ? 25141251/362
 *      SET FIXED OFF
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DECIMALS,EXP(),LOG(),SQRT(),VAL(),SET()
 *  $END$
*/

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET PRINTER
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggles the printer and controls the printer device
 *  $SYNTAX$
 *      SET PRINTER on | OFF
 *      SET PRINTER (<lPrinter>)
 *      SET PRINTER TO [<cPrinter>] [ADDITIVE]
 *  $ARGUMENTS$
 *      <lPrinter>   Logical condition by which to toggle the printer
 *
 *      <cPrinter> A device name or an alternate name
 *  $DESCRIPTION$
 *      This command can direct all output that is not controled by the
 *      @...SAY command and the DEVPOS() and DEVOUT() functions to the
 *      printer. If specified,the condition <lPrinter> toggles the printer
 *      ON if a logical true (.T.) and OFF if a logical false (.F.). If no
 *      argument is specified in the command, the alternate file (if one
 *      is open) is closed, or the device is reselected and the PRINTER
 *      option is turned OFF.
 *
 *      If a device is specified in <cPrinter>, the outpur will be directed
 *      to that device instead of to the PRINTER. A specified device may be
 *      a literal string or a variable, as long as the variable is enclosed
 *      in parentheses. For a network, do not use a trailing colon when
 *      redirecting to a device.
 *
 *      If an alternate file is specified, <cPrinter> becomes the name of a
 *      file that will contain the output. If no file extension is specified
 *      an extension of .prn will be defaulted to.
 *
 *      If the ADDITIVE clause is specified, the information will be appended
 *      to the end of the specified output file. Otherwise, a new file will
 *      be created with the specified name (or an existing file will first
 *      be cleared) and the information will then be appended to the file.
 *      The default is to create a new file.
 *  $EXAMPLES$
 *      SET PRINTER ON
 *      SET PRINTER TO LPT1
 *      ? 25141251/362
 *      SET PRINTER .F.
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DEVICE, SET CONSOLE, DEVOUT(), SET()
 *  $END$
*/

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET CONSOLE
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle the console display
 *  $SYNTAX$
 *      SET CONSOLE ON | off | (<lConsole>)
 *  $ARGUMENTS$
 *      <lConsole> Logical expression for toggle command
 *  $DESCRIPTION$
 *      This command turns the screen display either off or on for all
 *      screens display other then direct output via the @...SAY commands
 *      or the <-> DEVOUT() function.
 *
 *      If <lConsole> is a logical true (.T.),the console will be turned
 *      ON; otherwise, the console will be turned off.
 *  $EXAMPLES$
 *      SET console on
 *      ? DATE()
 *      SET console off
 *      ? date()
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET DEVICE,SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET DECIMALS
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle the console display
 *  $SYNTAX$
 *      SET DECIMALS TO [<nDecimal>]
 *  $ARGUMENTS$
 *      <nDecimal> Number of decimals places
 *  $DESCRIPTION$
 *      This command establishes the number of decimal places that Harbour
 *      will display in mathematical calculations, functions, memory variables,
 *      and fields. Issuing no parameter with this command will the default
 *      number of decimals to 0. For decimals to be seen, the SET FIXED ON
 *      command must be activated.
 *  $EXAMPLES$
 *      SET FIXED ON
 *      ? 25141251/362
 *      SET DECIMALS TO 10
 *      ? 214514.214/6325
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET FIXED,SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET DEVICE
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Directs all @...SAY output to a device.
 *  $SYNTAX$
 *      SET DEVICE TO [printer | SCREEN ]
 *  $ARGUMENTS$
 *      None.
 *  $DESCRIPTION$
 *      This command determines whether the output from the @...SAY command
 *      and the DEVPOS() and DEVOUT() function will be displayed on the
 *      printer.
 *
 *      When the device is set to the PRINTER,the SET MARGIN value adjusts
 *      the position of the column values accordingly. Also, an automatic
 *      page eject will be issued when the current printhead position is
 *      less than the last printed row. Finally, if used in conjunction with
 *      the @...GET commands, the values for the GETs will all be ignored.
 *  $EXAMPLES$
 *      SET DEVICE TO SCREEN
 *      ? 25141251/362
 *      SET DEVICE TO PRINTER
 *      SET PRINTER TO LPT1
 *      ? 214514.214/6325
 *      SET PRINTER OFF
 *      SET DEVICE TO SCREEN
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      @...SAY,SET PRINTER,SETPRC(),SET()
 *  $END$
 */

/*  $DOC$
 *  $TEMPLATE$
 *      Command
 *  $NAME$
 *      SET BELL
 *  $CATEGORY$
 *     Command
 *  $SUBCATEGORY$
 *     Environment
 *  $ONELINER$
 *      Toggle the bell to sound once a GET has been completed.
 *  $SYNTAX$
 *      SET BELL on | OFF | (<lBell>)
 *  $ARGUMENTS$
 *      <lBell> Logical expression for toggle command
 *  $DESCRIPTION$
 *      This command toggles the bell to sound whenever a character is
 *      entered into the last character positionof a GET, or if an invalid
 *      data type is entered into a GET.
 *
 *      If <lBell> is a logical true (.T.), the bell will be turned
 *      ON; otherwise, the bell will be turned off.
 *  $EXAMPLES$
 *      SET BELL ON
 *      cDummy:=space(20)
 *      @ 3,2 get cDummy
 *      Read
 *      SET bell off
 *  $STATUS$
 *      R
 *  $COMPLIANCE$
 *      C
 *  $SEEALSO$
 *      SET()
 *  $END$
 */