主题：为什么Line的右端锚定属性不起作用

 ctl = e.Form.CreateControl("LineRH" & e.form.controls("LineRH_number").text, ControlTypeEnum.line)
ctl.ThickNess = 4
ctl.LineColor = Color.SteelBlue
ctl.width = 60
ctl.Height = 4
ctl.anchor = Windows.Forms.AnchorStyles.Top Or Windows.Forms.AnchorStyles.Right

If ctl IsNot Nothing Then
Dim body As object = e.Form.controls("pnl_body")

ctl.Left = 100
ctl.Top = 100

body.AddControl(ctl)
End If

上述代码没有起到右端锚定的作用，请指教