diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 6fc3313840..c494dc8606 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,18 +16,29 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2011-04-15 22:03 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
+  * include/hbapi.h
+  * include/harbour.hbx
+  * src/common/hbver.c
+  * src/rtl/version.c
+    + added hb_verHostBitWidth( void ) -> int which retrieves bit width of host OS
+    + added HB_OSBITWIDTH() -> <nBits>
+    ; It will currently work on win platform, falling back to target arch bits
+      for others. Pls extend it for *nixes. For MS-DOS, 32 will be returned with
+      both currently supported compilers.
+
 2011-04-15 09:59 UTC-0800 Pritpal Bedi (bedipritpal@hotmail.com)
   * contrib/hbxbp/xbppushbutton.prg
     ! Fixed: :activate was firing event twice, on press and release, both.
 
   * contrib/hbxbp/xbpwindow.prg
-    ! Fixed: to reset window size as per GUI norms. Xbase++ seems 
+    ! Fixed: to reset window size as per GUI norms. Xbase++ seems
       wrong on this account where XbpDialog() height is "excluding"
       window frame-height whereas width is "inclusing" frame-width.
 
 2011-04-15 01:52 UTC-0800 Pritpal Bedi (bedipritpal@hotmail.com)
   * contrib/hbxbp/xbpwindow.prg
-    ! Depricated: setting fore/background colors of a part via 
+    ! Depricated: setting fore/background colors of a part via
       style sheet which was raising some issues. It needs further
       rationalization as well for some type of components.
 
diff --git a/harbour/include/harbour.hbx b/harbour/include/harbour.hbx
index 39bcfa56c6..a4346f4cff 100644
--- a/harbour/include/harbour.hbx
+++ b/harbour/include/harbour.hbx
@@ -661,6 +661,7 @@ DYNAMIC HB_NTOS
 DYNAMIC HB_NTOT
 DYNAMIC HB_NUMTOHEX
 DYNAMIC HB_OEMTOANSI
+DYNAMIC HB_OSBITWIDTH
 DYNAMIC HB_OSDRIVESEPARATOR
 DYNAMIC HB_OSERROR
 DYNAMIC HB_OSFILEMASK
diff --git a/harbour/include/hbapi.h b/harbour/include/hbapi.h
index e5e7845373..a6924f77ec 100644
--- a/harbour/include/hbapi.h
+++ b/harbour/include/hbapi.h
@@ -1138,6 +1138,7 @@ extern HB_EXPORT void *       hb_libSymAddr( PHB_ITEM pDynLib, const char * pszS
 extern HB_EXPORT void         hb_dynCall( int iFuncFlags, void * pFunction, int iParams, int iFirst, int * piArgFlags );
 
 /* misc */
+extern HB_EXPORT int          hb_verHostBitWidth( void );    /* retrieves bit width of host OS */
 extern HB_EXPORT const char * hb_verCPU( void );             /* retrieves a constant string with CPU architecture */
 extern HB_EXPORT const char * hb_verPlatformMacro( void );   /* retrieves a constant string with OS platform (as it appears in __PLATFORM__* macro) */
 extern HB_EXPORT char *       hb_verPlatform( void );        /* retrieves a newly allocated buffer containing platform version */
diff --git a/harbour/src/common/hbver.c b/harbour/src/common/hbver.c
index 4014fc401e..a3c6b7e33b 100644
--- a/harbour/src/common/hbver.c
+++ b/harbour/src/common/hbver.c
@@ -66,6 +66,7 @@
  *    hb_verPlatform() (support for detecting Windows NT on DOS)
  *    hb_verPlatform() (rearrangment and cleanup)
  *    hb_verPlatform() (Wine detection and some more)
+ *    hb_verHostBitWidth()
  *
  * See COPYING for licensing terms.
  *
@@ -151,6 +152,45 @@ const char * hb_verHostCPU( void )
 }
 #endif
 
+int hb_verHostBitWidth( void )
+{
+   int nBits;
+
+   /* Inherit the bit width we're building for */
+   #if   defined( HB_ARCH_64BIT )
+      nBits = 64;
+   #elif defined( HB_ARCH_32BIT )
+      nBits = 32;
+   #elif defined( HB_ARCH_16BIT )
+      nBits = 16;
+   #else
+      nBits = 0;
+   #endif
+
+   #if defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_64 )
+   {
+      typedef BOOL ( WINAPI * P_ISWOW64PROCESS )( HANDLE, PBOOL );
+
+      P_ISWOW64PROCESS pIsWow64Process = ( P_ISWOW64PROCESS ) GetProcAddress( GetModuleHandle( TEXT( "kernel32" ) ), "IsWow64Process" );
+
+      if( pIsWow64Process )
+      {
+         BOOL bIsWow64 = FALSE;
+
+         if( ! pIsWow64Process( GetCurrentProcess(), &bIsWow64 ) )
+         {
+            /* Try alternative method? */
+         }
+
+         if( bIsWow64 )
+            nBits = 64;
+      }
+   }
+   #endif
+
+   return nBits;
+}
+
 /* NOTE: OS() function, as a primary goal will detect the version number
          of the target platform. As an extra it may also detect the host OS.
          The latter is mainly an issue in DOS, where the host OS can be OS/2
diff --git a/harbour/src/rtl/version.c b/harbour/src/rtl/version.c
index 95de5c5af1..279273b4da 100644
--- a/harbour/src/rtl/version.c
+++ b/harbour/src/rtl/version.c
@@ -174,6 +174,11 @@ HB_FUNC( HB_VERSION )
    }
 }
 
+HB_FUNC( HB_OSBITWIDTH )
+{
+   hb_retni( hb_verHostBitWidth() );
+}
+
 HB_FUNC( HB_OSISWIN9X )
 {
    hb_retl( hb_iswin9x() );