--- mstools/h/ddeml.h	2018/08/09 18:20:29	1.1.1.1
+++ mstools/h/ddeml.h	2018/08/09 18:21:07	1.1.1.2
@@ -59,6 +59,8 @@ typedef struct tagCONVINFO {
     UINT    wLastError;    /* last transaction error.  */
     HCONVLIST hConvList;   /* parent hConvList if this conversation is in a list */
     CONVCONTEXT ConvCtxt;  /* conversation context */
+    HWND    hwnd;          /* window handle for this conversation */
+    HWND    hwndPartner;   /* partner window handle for this conversation */
 } CONVINFO;
 typedef CONVINFO FAR *PCONVINFO;
 
@@ -106,12 +108,13 @@ typedef CONVINFO FAR *PCONVINFO;
 #define DDE_FACKREQ	        0x8000
 #define DDE_FRELEASE  		0x2000
 #define DDE_FREQUESTED		0x1000
-#define DDE_FACKRESERVED	0x3ff0
-#define DDE_FADVRESERVED	0x3fff
-#define DDE_FDATRESERVED	0x4fff
-#define DDE_FPOKRESERVED	0xdfff
 #define DDE_FAPPSTATUS		0x00ff
-#define DDE_FNOTPROCESSED   0x0000
+#define DDE_FNOTPROCESSED       0x0000
+
+#define DDE_FACKRESERVED	(~(DDE_FACK | DDE_FBUSY | DDE_FAPPSTATUS))
+#define DDE_FADVRESERVED	(~(DDE_FACKREQ | DDE_FDEFERUPD))
+#define DDE_FDATRESERVED	(~(DDE_FACKREQ | DDE_FRELEASE | DDE_FREQUESTED))
+#define DDE_FPOKRESERVED	(~(DDE_FRELEASE))
 
 /***** message filter hook types *****/