datetimepicker若是在得到焦點的時候自動定位到日期上，TDateTimePicker自動焦點定位到年，TDateTimePicker自動焦點定位到月，TDateTimePicker自動焦點

定位到月上

if key=vk_return then
begin

DTP1.SetFocus;

SendMessage(DTP1.Handle,WM_KEYDOWN,39,0);

end;

 

定位到日上

if key=vk_return then
begin

DTP1.SetFocus;

SendMessage(DTP1.Handle,WM_KEYDOWN,39,0);

SendMessage(DTP1.Handle,WM_KEYDOWN,39,0);

end;

 

DTP1.SetFocus;

   SendMessage(DTP1.Handle,WM_KEYDOWN,VK_RIGHT,0);   SendMessage(DTP1.Handle,WM_KEYDOWN,VK_RIGHT,0)39是VK_RIGHT的虛擬鍵值。。通用的，就用上面這個，程序容易理解，就是把焦點移動到dataetimepicker上後，模擬光標vk_right被按下。