diff --git a/reactos/lib/gdi32/misc/stubs.c b/reactos/lib/gdi32/misc/stubs.c
index 0dde5376501..514fd01d4ca 100644
--- a/reactos/lib/gdi32/misc/stubs.c
+++ b/reactos/lib/gdi32/misc/stubs.c
@@ -1,4 +1,4 @@
-/* $Id: stubs.c,v 1.41 2003/12/12 14:22:36 gvg Exp $
+/* $Id: stubs.c,v 1.42 2003/12/15 20:47:57 navaraf Exp $
  *
  * reactos/lib/gdi32/misc/stubs.c
  *
@@ -544,21 +544,6 @@ PtVisible(
 }
 
 
-/*
- * @unimplemented
- */
-BOOL
-STDCALL
-RectVisible(
-	HDC		a0,
-	CONST RECT	*a1
-	)
-{
-	SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
-	return FALSE;
-}
-
-
 /*
  * @unimplemented
  */
diff --git a/reactos/lib/gdi32/objects/dc.c b/reactos/lib/gdi32/objects/dc.c
index 7025d407a36..233fe449a46 100644
--- a/reactos/lib/gdi32/objects/dc.c
+++ b/reactos/lib/gdi32/objects/dc.c
@@ -894,3 +894,16 @@ GetDCOrgEx(
 {
 	return NtGdiGetDCOrgEx(a0,a1);
 }
+
+/*
+ * @implemented
+ */
+BOOL
+STDCALL
+RectVisible(
+	HDC		a0,
+	CONST RECT	*a1
+	)
+{
+	return NtGdiRectVisible(a0,(RECT *)a1);
+}
diff --git a/reactos/subsys/win32k/objects/cliprgn.c b/reactos/subsys/win32k/objects/cliprgn.c
index 30513aeb782..1750bb21660 100644
--- a/reactos/subsys/win32k/objects/cliprgn.c
+++ b/reactos/subsys/win32k/objects/cliprgn.c
@@ -16,7 +16,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-/* $Id: cliprgn.c,v 1.27 2003/12/13 12:12:41 weiden Exp $ */
+/* $Id: cliprgn.c,v 1.28 2003/12/15 20:47:57 navaraf Exp $ */
 
 #undef WIN32_LEAN_AND_MEAN
 #include <windows.h>
@@ -224,9 +224,27 @@ BOOL STDCALL NtGdiPtVisible(HDC  hDC,
 }
 
 BOOL STDCALL NtGdiRectVisible(HDC  hDC,
-                      CONST PRECT  rc)
+                      CONST PRECT  UnsafeRect)
 {
-  UNIMPLEMENTED;
+   PDC dc = DC_LockDc(hDC);
+   BOOL Result = FALSE;
+   RECT Rect;
+
+   if (!dc)
+   {
+      return FALSE;
+   }
+
+   MmCopyFromCaller(&Rect, UnsafeRect, sizeof(RECT));
+
+   if (dc->w.hGCClipRgn)
+   {
+      IntLPtoDP(dc, (LPPOINT)&Rect, 2);
+      Result = UnsafeIntRectInRegion(dc->w.hGCClipRgn, &Rect);
+   }
+   DC_UnlockDc(hDC);
+
+   return Result;
 }
 
 BOOL STDCALL NtGdiSelectClipPath(HDC  hDC,