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DDE/PostMessage

First the sample code:

char *szApplication="Excel";
char *szTopic="Sheet1";
static HWND hwndClientDDE;
static HWND hwndServerDDE;
int atomApplication,atomTopic;
int atomItem;
long lgval;
char *szItemName="R1C1";
//ADDITIONAL VARIABLES DECLARED HERE...........

lgval=::SendMessage((HWND) -1, // broadcasts message WM_DDE_INITIATE, //initiates conversation (WPARAM) hwndClientDDE, //handle of client DDE
MAKELONG(atomApplication, // application-name atom atomTopic)); //topic-name atom

//Code to delete atom here................

atomItem = GlobalAddAtom(szItemName);

lgval=::PostMessage(hwndServerDDE,
WM_DDE_REQUEST,
(WPARAM) hwndClientDDE,
PackDDElParam(WM_DDE_REQUEST, CF_TEXT, atomItem));

This is pretty much out of MSDN, I am using VC 1.0 (can you believe it!). I want to hook to an Excel spreadsheet. The above SendMessage returns a 1, but then it broadcasts to all active windows so I'm not totally convinced. The PostMessage comes back as 0 and the PackDDElParam is not recognized at all in the compiling(so I tried it with MAKELONG, taking out the WM_DDE_REQUEST - and got the 0). Does anybody know why this doesn't work????

dpms

ASKER

Edited text of question

ASKER CERTIFIED SOLUTION

Tommy Hui

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dpms

ASKER

I did put in an " #include <dde.h> " statement from the start. But the packddelparam comes back as unrecognized? Am I missing something?

Tommy Hui

Make sure you have spelled out PackDDElParam correctly and with the right case. The other possibility is that Visual C++ 1.0 may not have the right header file. You may want to search the headers to find out where PackDDElParam may be located.