S songhb Unregistered / Unconfirmed GUEST, unregistred user! 2002-11-12 #1 如:一个TBitBtn,如何判断其中的OnClick事件已被定义?
Z zw84611 Unregistered / Unconfirmed GUEST, unregistred user! 2002-11-12 #2 if assigned(OnClick) then ...
D dedema Unregistered / Unconfirmed GUEST, unregistred user! 2002-11-12 #3 if assigned(TBitBtn.onclick) then showmessage('事件己定义');