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WM_COPYDATA USING?

Posted on 2003-11-10
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Last Modified: 2013-11-20
HW to retrive data when is sent using WM_COPYDATA ?
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Question by:bob0001
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3 Comments
 
LVL 3

Accepted Solution

by:
freewell earned 30 total points
ID: 9713504

// In the sending APP1
#define WM_GETMESG WM_USER+50

typedef struct
{
     int dataA;
     int dataB;
} DATA, *LPDATA;

DATA Data;
COPYDATASTRUCT CopyDataStruct;

CopyDataStruct.dwData = WM_GETMESG;
CopyDataStruct.cbData = sizeof(DATA);  // size of data
CopyDataStruct.lpData = &Data; // data structure

SendMessage(hwnd_APP2,WM_COPYDATA,(WPARAM)(HWND)m_hWnd,(LPARAM)(LPVOID)&CopyDataStruct);




// In the receiving APP2
#define WM_GETMESG WM_USER+50
typedef struct
{
     int dataA;
     int dataB;
}DATA, *LPDATA;

LPDATA pData;
COPYDATASTRUCT *pCopyDataStruct;
...


// ************ Code fragment ****************
//
case WM_COPYDATA:
     pCopyDataStruct = (COPYDATASTRUCT *) lParam;
     switch(pCopyDataStruct->dwData)
     {
     case WM_GETMESG:
          pData = (LPDATA)pCopyDataStruct->lpData;
          pData->dataA; // You get your data!
     break;
     }
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Author Comment

by:bob0001
ID: 9713558
I am using MFC. can i use thid code

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LVL 48

Expert Comment

by:AlexFM
ID: 9713770
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