procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState); begin case key of 37:showmessage('左方向键被按下'); 38:showmessage('上方向键被按下'); 39:showmessage('右方向键被按下'); 40:showmessage('下方向键被按下'); end; end;procedure TForm1.FormKeyUp(Sender: TObject; var Key: Word; Shift: TShiftState); begin if key=65 then showmessage('"A键弹起"'); end;
Form1.KeyPreview:=True;Form1的onKeyUp事件 if key=65 then showmessage('"A键弹起"');
Shift: TShiftState);
begin
case key of
37:showmessage('左方向键被按下');
38:showmessage('上方向键被按下');
39:showmessage('右方向键被按下');
40:showmessage('下方向键被按下');
end;
end;procedure TForm1.FormKeyUp(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if key=65 then showmessage('"A键弹起"');
end;
if key=65 then showmessage('"A键弹起"');