[单项选择题] 窗体上有一个图片框和一个命令按钮(拖动模式为自动)，执行程序后，拖动按钮经过图片框时输出结果为 Private Sub Picture1_Dr

[单项选择题] 窗体上有一个图片框和一个命令按钮(拖动模式为自动)，执行程序后，拖动按钮经过图片框时输出结果为

Private Sub Picture1_DragOver(Source As Control, X As Single, Y As Single, State As Integer)

Static a As Boolean

If Not a Then

Print"AA"

a=True

End If

End Sub

Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Shingle, Y As Single)

Static b As Boolean

If Not b Then

Print"BB"

b=True

End If

End Sub

A．AABB

B．BBAA

C．AA

D．BB

C