如何清空一个只读文本框的内容,类似msn或者popo的聊天窗口
用了n多api函数都不行,哪位高手看看?
SendMessage(hMsgWnd,EM_SETREADONLY,0,0);
SendMessage(hMsgWnd,EM_SETMODIFY,1,0);
SendMessage(hMsgWnd,EM_SETLIMITTEXT,100,0);
sendmessage(hMsgWnd,WM_SETTEXT,0,integer(pchar(sSend)));
SendMessage(hMsgWnd,WM_SETREDRAW,1,0);
SendMessage(hMsgWnd,EM_SETSEL,0,-1);
SendMessage(hMsgWnd,EM_REPLACESEL,1,integer(@sSend));