Question

如何用SendMessage()函数传递字符串

Answer 1

函数传递字符串 ----------------------------- 一、两个参数都带字符串的形式： void CAaaDlg::OnButton1(){char* p1 = "Willis"; char* p2 = "VCHelp"; SendMessage(WM_CURRENTINFO, (WPARAM)p1, (LPARAM)p2 );}LRESULT CAaaDlg::OnCurrentInfo(WPARAM wParam, LPARAM lParam ){MessageBox((LPSTR)wParam,(LPSTR)lParam,0);// 消息函数里接收字符串return 0;}-------- 二、只带一个字符串的形式： CString strPara = _T("fggg"); ::SendMessage(hWnd,WM_XXXX,0,(LPARAM)(LPCTSTR)strPara); OnMessageXXXX(WPARAM wParam,LPARAM lParam){CString strddd = (LPCTSTR)lParam; // 在消息处理函数里接收字符串} ////////how to use wm_copydata to pass string使用WM_COPYDATA： CString str = _T( "Hello" ); HWND hWndReceived = FindWindow( "Receiver", NULL ); COPYDATASTRUCT cpd; cpd.dwData = 0; cpd.cbData = strDataToSend.GetLength(); cpd.pData = (void*)str.GetBuffer(cpd.cbData); SendMessage( hWndReceived, WM_COPYDATA, 0, (LPARAM) & cpd ); str.ReleaseBuffer(); 加入映射宏： BEGIN_MESSAGE_MAP(CMyWnd, CWnd) //{{AFX_MSG_MAP(CMyWnd) ON_WM_COPYDATA() //}}AFX_MSG_MAP END_MESSAGE_MAP()