单项选择题

在以下事件过程中,可以在用户按下鼠标右键时,显示一个上边框,以鼠标当前位置为心的弹出式菜单,而且这个弹出式菜单还可以识别右键对菜单命令的选择,相应的选项;

A.Private Sub Form _ Mouse Up(Button As Integer,Shift AS Integer,_                 X As Single,Y As Singl    If Button=2 Then      PopupMenu mnuEdit,vbPopupMenuCenterAlign Or_        vbPopupMenuRightButton,X,Y,mnuEditOpen    End If  End Sub
B.Private Sub Form _ MouseUp(Button AS Integer,Shift AS Integer,_                X As Single,Y As Singl    If Button=2 Then      PopupMenu mnuEdit,    End If  End Sub
C.Private Sub Form _ MouseUp(Button AS Integer,Shift AS Integer,_                X As Single,Y As Singl    PopupMenu mnuEdit,vbPopupMenuCenterAlign Or_           vbPopupMenuRightButton  End Sub
D.Private SUb Form _ MouseUp(Button AS Integer,_                Shift As Integer,X As Single,Y As Singl    If Button=2 Then         PopupMenu mnuEdit,2    End If  End Sub