--- mstools/samples/ddeml/client/infoctrl.c	2018/08/09 18:21:25	1.1.1.2
+++ mstools/samples/ddeml/client/infoctrl.c	2018/08/09 18:23:22	1.1.1.3
@@ -1,3 +1,14 @@
+
+/******************************************************************************\
+*       This is a part of the Microsoft Source Code Samples. 
+*       Copyright (C) 1993 Microsoft Corporation.
+*       All rights reserved. 
+*       This source code is only intended as a supplement to 
+*       Microsoft Development Tools and/or WinHelp documentation.
+*       See these sources for detailed information regarding the 
+*       Microsoft samples programs.
+\******************************************************************************/
+
 /***************************************************************************
  *                                                                         *
  *  MODULE      : infoctrl.c                                               *
@@ -415,7 +426,7 @@ LPARAM lParam)
             picd = (INFOCTRL_DATA *)GetWindowLong(hwnd, GWL_INFODATA);
             ppsz = (PSTR *)&picd->pszUL + wParam;
 
-            if (lParam == NULL)
+            if (lParam == 0)
                 lParam = (DWORD)(LPSTR)szNULL;
 
             if (*ppsz) {
@@ -510,7 +521,7 @@ DoDWP:
     default:
         return (DefWindowProc(hwnd, msg, wParam, lParam));
     }
-    return (NULL);
+    return (0);
 }