对窗体编写如下事件过程： Private Sub Form_ MouseDown(
题型：单项选择题
问题：
对窗体编写如下事件过程：
Private Sub Form_ MouseDown(Button As Integer，Shift As Integer，X As Single，Y As Single)
If Button =2 Then
Print “AAAAA”
End If
End Sub
Private Sub Form_ MouseUp (Button As Integer，Shift As Integer，X As Single，Y As Single)
Print “BBBBB”
End Sub
程序运行后，如果单击鼠标右键，则输出结果为______ 。
A．AAAAA
BBBBB
B．BBBBB
C．AAAAA
D．BBBBB
AAAAA