diff --git a/reactos/lib/ntdll/rtl/callback.c b/reactos/lib/ntdll/rtl/callback.c
index 659845bc59c..e0d9a280fc4 100644
--- a/reactos/lib/ntdll/rtl/callback.c
+++ b/reactos/lib/ntdll/rtl/callback.c
@@ -1,4 +1,4 @@
-/* $Id: callback.c,v 1.3 2000/12/23 02:37:38 dwelch Exp $
+/* $Id: callback.c,v 1.4 2002/01/15 00:43:17 dwelch Exp $
  *
  * COPYRIGHT:         See COPYING in the top level directory
  * PROJECT:           ReactOS kernel
@@ -16,7 +16,8 @@
 
 /* TYPES *********************************************************************/
 
-typedef NTSTATUS (*CALLBACK_FUNCTION)(PVOID Argument, ULONG ArgumentLength);
+typedef NTSTATUS STDCALL (*CALLBACK_FUNCTION)(PVOID Argument, 
+					      ULONG ArgumentLength);
 
 /* FUNCTIONS *****************************************************************/
 
diff --git a/reactos/ntoskrnl/ps/thread.c b/reactos/ntoskrnl/ps/thread.c
index 9ccaf6d5441..ea968400884 100644
--- a/reactos/ntoskrnl/ps/thread.c
+++ b/reactos/ntoskrnl/ps/thread.c
@@ -1,4 +1,4 @@
-/* $Id: thread.c,v 1.84 2002/01/13 22:52:07 dwelch Exp $
+/* $Id: thread.c,v 1.85 2002/01/15 00:43:18 dwelch Exp $
  *
  * COPYRIGHT:              See COPYING in the top level directory
  * PROJECT:                ReactOS kernel
@@ -509,7 +509,17 @@ NtW32Call (IN ULONG RoutineIndex,
 	   OUT PVOID* Result OPTIONAL,
 	   OUT PULONG ResultLength OPTIONAL)
 {
-  UNIMPLEMENTED;
+  PKTRAP_FRAME TrapFrame;
+  PETHREAD Thread;
+  PULONG OldStack;
+
+  Thread = PsGetCurrentThread();
+  if (Thread->Tcb.CallbackStack != NULL)
+    {
+      return(STATUS_UNSUCCESSFUL);
+    }
+
+
 }
 
 NTSTATUS STDCALL 
diff --git a/reactos/subsys/win32k/include/dib.h b/reactos/subsys/win32k/include/dib.h
new file mode 100644
index 00000000000..54ef5c59d5c
--- /dev/null
+++ b/reactos/subsys/win32k/include/dib.h
@@ -0,0 +1,6 @@
+#ifndef __WIN32K_DIB_H
+#define __WIN32K_DIB_H
+
+int DIB_GetDIBWidthBytes(int  width, int  depth);
+
+#endif /* __WIN32K_DIB_H */