A.Click B.LostFocus C.SetFocus D.GotFocus
A.SetFocus B.LostFocus C.GotFocus D.Click
A.對(duì)象失去焦點(diǎn) B.對(duì)象接收到焦點(diǎn) C.用戶按下并釋放鍵盤上某個(gè)鍵 D.用戶在控件上按下并釋放鼠標(biāo)左鍵