呵呵，谁说只能用hook,timmer 行。
procedure TForm1.Timer1Timer(Sender: TObject);
var keystate:TKeyboardState;
begin
caption:='';
GetKeyboardState(keystate);
if keystate[vk_lbutton] and $80 <>0 then
caption:='lbutton down';
if keystate[vk_rbutton] and $80 <>0 then
caption:='Rbutton down';
end;
