Private Sub MenuItem5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem5.Click
MenuItem5.Checked = Not MenuItem5.Checked /*这段代码是什么意思啊*/
If MenuItem5.Checked = True Then
flag = 3
MenuItem3.Checked = False
MenuItem4.Checked = False
Else
flag = 0
End If
End Sub

谢谢啊