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POProblem in Communication between two dialog boxes through WM_COPYDATA?
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  1. POProblem in Communication between two dialog boxes through WM_COPYDATA?
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    copied!<p>Friends its really giving me a great head ache about the problem I am facing for the couple of days...Its simple...I want to communicate between two/more dialog boxes for example if there is a variable CString test..I want this test variable to be common for the dialogs/classes(considering each dialog having separate classes)...I tried lot methods, everything failed..atlast I tried this WM_COPYDATA method...even now, am not achieve what i wanted to do...</p> <pre><code>Sender Class: #define ORGININFO 1 typedef struct ShareMessage { CString mydata; int myValue; }MYDATA; void CCopyDataDlg::OnBnClickedOk() { // TODO: Add your control notification handler code here MYDATA myData; COPYDATASTRUCT cData; myData.mydata.SetString(L"Rakesh"); cData.dwData = ORGININFO; cData.cbData = sizeof(myData); cData.lpData = &amp;myData; HWND hwnd = (HWND)FindWindow(L"Dialog1",L"Test"); SendMessageA(m_hWnd,WM_COPYDATA,(WPARAM)hwnd,(LPARAM)(LPVOID)&amp;myData); Dialog1 dlg; dlg.DoModal(); } </code></pre> <p>Receiver class:</p> <pre><code>#define iMessage 1 typedef struct MyDatas { CString myData; int myint; }DATA; PCOPYDATASTRUCT pData; LRESULT Dialog1::WindowProc(UINT message,WPARAM wParam,LPARAM lparam) { if(WM_COPYDATA != NULL) pData = (PCOPYDATASTRUCT)lparam; switch(pData-&gt;dwData) { case iMessage: MessageBoxA((HWND)AfxGetInstanceHandle(),(LPCSTR)(LPCTSTR)((DATA*)(pData-&gt;lpData))-&gt;myData,(LPCSTR)L"Test",MB_OK); } return 0; } </code></pre> <p>in the above I dont know what is the mistake I am doing but its not receiving the data from the CCopyDialog class...Please help me with this...</p>
 

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