--- mstools/samples/showdib/dlgopen.c	2018/08/09 18:20:01	1.1
+++ mstools/samples/showdib/dlgopen.c	2018/08/09 18:20:44	1.1.1.2
@@ -106,7 +106,7 @@ HFILE APIENTRY DlgOpenFile (
 
     /* Show the dialog box */
     lpProc = MakeProcInstance ((FARPROC)DlgfnOpen, hInstance);
-    fh = DialogBox (hInstance, "DlgOpenBox", hwndParent, (WNDPROC)lpProc);
+    fh = DialogBox (hInstance, "DlgOpenBox", hwndParent, lpProc);
     FreeProcInstance (lpProc);
 
     if (fh != 0){