主题：[求助]代码错误

 老师，
   下面标颜色的代码有误，劳烦您给看下


Dim tbl As WinForm.TabControl = e.Form.CreateControl("tbl_01", ControlTypeEnum.TabControl)
e.Form.AddControl(tbl)
Dim panl As  WinForm.Panel=e.Form.CreateControl("pl_01", ControlTypeEnum.Panel)
Dim spl As WinForm.SplitContainer=e.Form.CreateControl("spl_01", ControlTypeEnum.SplitContainer)
spl.Dock=5
panl.AddControl(spl)
MessageBox.Show(5)
tbl.TabPages(0).AddControl(panl)
MessageBox.Show(6)

Dim w As Integer=tbl.TabPages("1").Width
Dim h As Integer=tbl.TabPages("1").Height
If w-350<=0 Then
    spl.SplitterDistance =w*0.2'必须是添加控件后添加的属性
Else
      spl.SplitterDistance =350'必须是添加控件后添加的属性
End If