--- mstools/samples/ddeml/client/dde.c	2018/08/09 18:21:26	1.1.1.2
+++ mstools/samples/ddeml/client/dde.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      : dde.c                                                    *
@@ -227,7 +238,7 @@ XACT *pxact)
              */
             DdeFreeDataHandle(pxact->ret);
             pxact->ret = 0L;
-            SendMessage(hwndInfoCtrl, ICM_SETSTRING, ICSID_UR, NULL);
+            SendMessage(hwndInfoCtrl, ICM_SETSTRING, ICSID_UR, 0);
         }
     } else {
         /*
@@ -541,7 +552,7 @@ HDDEDATA hData)
 
 #define CBBUF  1024
 
-    if (hData == NULL) {
+    if (hData == 0) {
         return(NULL);
     }