用WM_COPYDATA的前提：
1，知道接收消息进程的句柄。
2，接收消息进程重载了WM_COPYDATA消息映射
发送端
接收端
注意乱码的处理。
url: http://greatverve.cnblogs.com/archive/2012/12/17/WM_COPYDATA.html
1，知道接收消息进程的句柄。
2，接收消息进程重载了WM_COPYDATA消息映射
发送端
void CSendDlg::OnBnClickedSend()
{
CWnd *pWnd = CWnd::FindWindow(NULL, " 接收窗口的标题 ");
CString sCopyData = " 传递的字符串 ";
COPYDATASTRUCT cpd;
cpd.dwData = 0;
cpd.cbData = sCopyData.GetLength() + 1; // 多加一个长度，防止乱码
cpd.lpData = ( void*)sCopyData.GetBuffer(cpd.cbData);
pWnd->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd);
}
{
CWnd *pWnd = CWnd::FindWindow(NULL, " 接收窗口的标题 ");
CString sCopyData = " 传递的字符串 ";
COPYDATASTRUCT cpd;
cpd.dwData = 0;
cpd.cbData = sCopyData.GetLength() + 1; // 多加一个长度，防止乱码
cpd.lpData = ( void*)sCopyData.GetBuffer(cpd.cbData);
pWnd->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd);
}
//
声明
afx_msg BOOL OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct);
// 实现
ON_WM_COPYDATA()
BOOL CReceiveDlg::OnCopyData( CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct )
{
AfxMessageBox((LPCSTR)(pCopyDataStruct->lpData));
return CWnd::OnCopyData(pWnd, pCopyDataStruct);
}
afx_msg BOOL OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct);
// 实现
ON_WM_COPYDATA()
BOOL CReceiveDlg::OnCopyData( CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct )
{
AfxMessageBox((LPCSTR)(pCopyDataStruct->lpData));
return CWnd::OnCopyData(pWnd, pCopyDataStruct);
}
url: http://greatverve.cnblogs.com/archive/2012/12/17/WM_COPYDATA.html
本文转自wenglabs博客园博客，原文链接：http://www.cnblogs.com/greatverve/archive/2012/12/17/WM_COPYDATA.html
，如需转载请自行联系原作者
