用WM_COPYDATA實現進程通信

用WM_COPYDATA的前提：
1，知道接收消息進程的句柄。
2，接收消息進程重載了WM_COPYDATA消息映射 
發送端

 
          void CSendDlg::OnBnClickedSend() 
          
 { 
          
     CWnd *pWnd = CWnd::FindWindow(NULL, 
          " 
          接收窗口的標題 
          "); 
          
 
          
     CString sCopyData =  
          " 
          傳遞的字符串 
          "; 
          
     COPYDATASTRUCT cpd; 
          
     cpd.dwData =  
          0; 
          
     cpd.cbData = sCopyData.GetLength() +  
          1; 
          // 
          多加一個長度，防止亂碼 
          
     cpd.lpData = ( 
          void*)sCopyData.GetBuffer(cpd.cbData); 
          
 
          
     pWnd->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd); 
          
 } 
         

接收端

 
          // 
           聲明 
          
afx_msg BOOL OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct); 
          
 
          // 
           實現 
          
ON_WM_COPYDATA() 
          
BOOL CReceiveDlg::OnCopyData( CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct ) 
          
{ 
          
    AfxMessageBox((LPCSTR)(pCopyDataStruct->lpData)); 
          
     
          return CWnd::OnCopyData(pWnd, pCopyDataStruct); 
          
} 
         

注意亂碼的處理。
url: http://greatverve.cnblogs.com/archive/2012/12/17/WM_COPYDATA.html