diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 27ccb3a5cd..cf1b28e085 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -8,6 +8,28 @@
    2009-12-31 13:59 UTC+0100 Foo Bar (foo.bar foobar.org)
 */
 
+2009-02-18 16:05 UTC+0100 Viktor Szakats (harbour.01 syenar hu)
+  * config/win/bcc32.cf
+    * Synced flags with non-GNU make. This adds MT support.
+
+  * config/win/install.cf
+    ! Install command modified to not give errors and block
+      the whole build process if the target file already exists.
+      The workaround consisted of changing 'copy' to 'xcopy /d /y'.
+
+  * include/inkey.ch
+    + Added comments on K_MM*DOWN codes.
+      These also should be protected, and moved to
+      local the local headers belonging to GTs
+      supporting this feature (GTWVG notably).
+
+  * source/rtl/gtwvt/gtwvt.c
+    + Protected non-Clipper compatible extension regarding
+      K_MM*DOWN with __HB_GTWVT_GEN_K_MMDOWN_EVENTS #define.
+      Also see notes in about app level code modification
+      needed if you want to continue using default Harbour build:
+      2009-02-18 12:20 UTC+0100 Viktor Szakats (harbour.01 syenar hu)
+
 2009-02-18 14:36 UTC+0100 Viktor Szakats (harbour.01 syenar hu)
   * contrib/gtalleg/tests/gtalleg-static.hbp
     + Added some Windows libs. The libs seem compiler
diff --git a/harbour/config/win/bcc32.cf b/harbour/config/win/bcc32.cf
index 0f223aa734..f853b5fd00 100644
--- a/harbour/config/win/bcc32.cf
+++ b/harbour/config/win/bcc32.cf
@@ -15,7 +15,7 @@ CC = bcc32.exe
 CC_IN = -c
 CC_OUT = -o
 CPPFLAGS = -I. -I$(HB_INC_COMPILE)
-CFLAGS = -4 -O2 -OS -Ov -Oi -Oc -q -d -w -w-sig-
+CFLAGS = -4 -O2 -OS -Ov -Oi -Oc -q -d -Q -w -w-sig- -tWM
 
 LD = bcc32.exe
 LDFLAGS = -O2
diff --git a/harbour/config/win/install.cf b/harbour/config/win/install.cf
index b386ca5f0e..890b84c376 100644
--- a/harbour/config/win/install.cf
+++ b/harbour/config/win/install.cf
@@ -15,7 +15,7 @@ INSTALL_LIST = $(subst /,\,$(INSTALL_OBJS))
 ifeq ($(CMD_EXE),yes)
 # cmd.exe no command line size limit
 INSTALL_RULE = \
-	$(COMSPEC) /c for %f in ($(INSTALL_LIST)) do copy %f $(subst /,\,$(INSTALL_DIR))
+	$(COMSPEC) /c for %f in ($(INSTALL_LIST)) do xcopy /d /y %f $(subst /,\,$(INSTALL_DIR))
 else
 # We have to use script to overcome the DOS limit of max 128 characters
 # NOTE: The empty line directly before 'endef' HAVE TO exist!
diff --git a/harbour/include/inkey.ch b/harbour/include/inkey.ch
index d421bca220..3e2fb681d1 100644
--- a/harbour/include/inkey.ch
+++ b/harbour/include/inkey.ch
@@ -85,9 +85,9 @@
 #define K_MBUTTONDOWN           1008   /* Middle Button Down */
 #define K_MBUTTONUP             1009   /* Middle Button Up */
 #define K_MDBLCLK               1010   /* Middle Button Double Click */
-#define K_MMLEFTDOWN            1011   /* Mouse Move Left Down */
-#define K_MMRIGHTDOWN           1012   /* Mouse Move Right Down */
-#define K_MMMIDDLEDOWN          1013   /* Mouse Move Middle Down */
+#define K_MMLEFTDOWN            1011   /* Mouse Move Left Down (non-Clipper compatible, GTWVT only, needs #define __HB_GTWVT_GEN_K_MMDOWN_EVENTS) */
+#define K_MMRIGHTDOWN           1012   /* Mouse Move Right Down (non-Clipper compatible, GTWVT only, needs #define __HB_GTWVT_GEN_K_MMDOWN_EVENTS) */
+#define K_MMMIDDLEDOWN          1013   /* Mouse Move Middle Down (non-Clipper compatible, GTWVT only, needs #define __HB_GTWVT_GEN_K_MMDOWN_EVENTS) */
 #define K_MWFORWARD             1014   /* Mouse Wheel Forward */
 #define K_MWBACKWARD            1015   /* Mouse Wheel Backward */
 #define K_NCMOUSEMOVE           1016   /* Non-Client Area Mouse Movement */
diff --git a/harbour/source/rtl/gtwvt/gtwvt.c b/harbour/source/rtl/gtwvt/gtwvt.c
index 40a7ee5997..96f2ee3556 100644
--- a/harbour/source/rtl/gtwvt/gtwvt.c
+++ b/harbour/source/rtl/gtwvt/gtwvt.c
@@ -901,7 +901,6 @@ static void hb_gt_wvt_MouseEvent( PHB_GTWVT pWVT, UINT message, WPARAM wParam, L
 {
    POINT xy, colrow;
    SHORT keyCode = 0;
-   SHORT keyState;
 
    HB_SYMBOL_UNUSED( wParam );
 
@@ -1084,7 +1083,8 @@ static void hb_gt_wvt_MouseEvent( PHB_GTWVT pWVT, UINT message, WPARAM wParam, L
          }
          else
          {
-            keyState = ( SHORT ) wParam;
+#if defined( __HB_GTWVT_GEN_K_MMDOWN_EVENTS )
+            SHORT keyState = ( SHORT ) wParam;
 
             switch( keyState )
             {
@@ -1101,13 +1101,18 @@ static void hb_gt_wvt_MouseEvent( PHB_GTWVT pWVT, UINT message, WPARAM wParam, L
                   keyCode = K_MOUSEMOVE;
             }
             break;
+#else
+            keyCode = K_MOUSEMOVE;
+            break;
+#endif
          }
       }
       case WM_MOUSEWHEEL:
-         keyState = HIWORD( wParam );
+      {
+         SHORT keyState = ( SHORT ) HIWORD( wParam );
          keyCode = keyState > 0 ? K_MWFORWARD : K_MWBACKWARD;
          break;
-
+      }
       case WM_NCMOUSEMOVE:
          keyCode = K_NCMOUSEMOVE;
          break;