Private Sub Form _ MouseDownBuRonAs Integer,ShiftAs Integer, XAs Single, YAs Single) IfButton=2 Then Print "AAAAA" End If End Sub Private Sub Form_MouseUpButtonAs Integer,ShiftAs Integer,XAs Single, YAs Single) Print "BBBBB" End Sub 程序运行后,如果单击鼠标右键,则输出结果为 ______。 AAAAA BBBBB BBBBB C.AAAAA D.BBBBB AAAAA