单项选择题

A.SubForm_MouseDown(ButtonAsInteger,ShiftAsInteger,XAsSingle,YAsSingle):
PopupMenutest:EndSub
B.SubForm_keypress(ButtonAsInteger,ShiftAsInteger,XAsSingle,YAsSingle):
PopupMenutest:EndSub
C.SubForm_keyDown(ButtonAsInteger,ShiftAsInteger,XAsSingle,YAsSingle):
PopupMenutest:EndSub
D.SubForm_MouseDown(ShiftAsInteger,XAsSingle,YAsSingle):
PopupMenutest:EndSub