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Delphi定时Showmessage事件

在Delphi中,调用Showmessage后,如何使弹出的对话框在一秒钟后自动关闭,而不用手动去点确定
1:用timer控件的函数
procedure TForm1.Timer1Timer(Sender: TObject);
var
AHandle: THandle;
begin
AHandle := FindWindow('TMessageForm',
PChar(Application.Title));
if AHandle > 0 then
SendMessage(AHandle,
WM_CLOSE, 0, 0);
end;



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