窗体有如下事件代码,运行后,先单击命令按钮CmdL,再单击命令按钮CmdR,最后单击命令按钮CmdCls,窗体上被删除的图形是 。 Private Sub CmdL_Click() '划线 AutoRedraw=True Line (-500, -500)-(1000, 1000) End Sub Private Sub CmdR_Click() '画圆 AutoRedraw=False Circle (100, 100), 200 End Sub Private Sub CmdCls_Click() Cls End Sub