想用代码创建SplitContainer，并在panel1，panel2中分别放其他的控件，代码执行后，添加进去的控件看不见，不知为什么？

Dim split As WinForm.SplitContainer
Dim pnl As WinForm.Panel
Dim tbl As WinForm.Table
Dim but As WinForm.Button

With e.form
\' 创建split分隔
  split = e.Form.CreateControl("split1", ControlTypeEnum.splitcontainer)
  split.Dock = Windows.Forms.DockStyle.Fill
  split.Orientation = windows.Forms.Orientation.horizontal
  split.splitterdistance =900
  split.splitterwidth = 4
  e.form.addcontrol(split)

\'创建panel工具栏
  pnl = e.Form.CreateControl("pnl1", ControlTypeEnum.panel)
  pnl.SetBounds(200, 0, 400,40)
  pnl.Topmost = True
  pnl.backcolor= Color.FromARGB(187,0,10,203)
  split.panel1.AddControl(pnl)

\'创建按钮
  but = e.Form.CreateControl("butadd", ControlTypeEnum.button)
  split.Panel1.AddControl(but)

End With

说句实在话，我一开始就在学习和研究这个SplitContainer，我觉得这个还是有点小小的问题。我在学习中发现2个问题：

当在SplitContainer中嵌入多个SplitContainer或其他容器类控件，将内置控件锚定设置为top，bottom,left,right,保存后，再打开设计窗口，控件的尺寸发生变化，不是最初设计的尺寸，每次进入窗口设计都要重新设置控件尺寸，很烦，这个好像以前有提过。还有，当窗体被拉伸时，个别控件的移动距离比例好像也是不是期望的，导致控件间的距离发生变化。

还有，有时候，在窗体设计下拉菜单中选中某个控件，但实际上这个控件并没有呈现出被选中的状态：没有框线。

记得以前有版主提过并提供一个其他软件的例子，窗体设计下，控件管理采用树形菜单，这样可以很方便控件管理，至少容易看出哪个控件在哪个容器里。目前通过下拉菜单来查看管理控件感觉有点弱。

解决两个问题,panel还是看不见，原因待查：

Dim split As WinForm.SplitContainer
Dim pnl As WinForm.Panel
Dim tbl As WinForm.Table
Dim but As WinForm.Button

With e.form
\' 创建split分隔
  split = e.Form.CreateControl("split1", ControlTypeEnum.splitcontainer)
  split.Dock = Windows.Forms.DockStyle.Fill
  split.Orientation = windows.Forms.Orientation.horizontal
  split.splitterwidth = 4
  e.form.addcontrol(split)
  split.SplitterDistance = 500

\'创建按钮
  but = e.Form.CreateControl("butadd", ControlTypeEnum.button)
  split.Panel1.AddControl(but)
  but.TopMost = True
End With

上述问题存在普遍性，即用代码动态创建一个容器类控件，再用代码动态创建其他控件并将这些控件添加到容器控件，就出现容器内的控件s不可见。非常郁闷

Dim split As WinForm.SplitContainer
Dim pnl As WinForm.Panel
Dim tbl As WinForm.Table
Dim but As WinForm.Button

With e.form
\' 创建split分隔
split = e.Form.CreateControl("split1", ControlTypeEnum.splitcontainer)
split.Dock = Windows.Forms.DockStyle.Fill
split.Orientation = windows.Forms.Orientation.horizontal
split.splitterwidth = 4
e.form.addcontrol(split)
split.SplitterDistance = 500

我理解错了！

搞定：

Dim split As WinForm.SplitContainer
Dim pnl As WinForm.Panel
Dim tbl As WinForm.Table
Dim but As WinForm.Button

With e.form
    \' 创建split分隔
    split = e.Form.CreateControl("split1", ControlTypeEnum.splitcontainer)
    split.Dock = Windows.Forms.DockStyle.Fill
    split.Orientation = windows.Forms.Orientation.horizontal
    split.splitterwidth = 4
    e.form.addcontrol(split)
    split.splitterdistance =900
   
    \'创建panel工具栏
    pnl = e.Form.CreateControl("pnl1", ControlTypeEnum.panel)
    pnl.SetBounds(0, 0, 400,400)
    split.panel1.AddControl(pnl)
    pnl.Topmost = True
    pnl.backcolor= Color.FromARGB(187,0,10,203)
   
    but = e.Form.CreateControl("butadd", ControlTypeEnum.button)
    split.Panel1.AddControl(but)
    but.TopMost = True
End With

这样一样可以的：

Dim split As WinForm.SplitContainer
Dim pnl As WinForm.Panel
Dim tbl As WinForm.Table
Dim but As WinForm.Button

With e.form
    \' 创建split分隔
    split = e.Form.CreateControl("split1", ControlTypeEnum.splitcontainer)
    split.Dock = Windows.Forms.DockStyle.Fill
    split.Orientation = windows.Forms.Orientation.horizontal
    split.splitterwidth = 4
    e.form.addcontrol(split)
    split.splitterdistance =900
   
    \'创建panel工具栏
    pnl = e.Form.CreateControl("pnl1", ControlTypeEnum.panel)
    pnl.SetBounds(0, 0, 400,400)
    split.panel1.AddControl(pnl)
    pnl.Topmost = True
    pnl.backcolor= Color.FromARGB(187,0,10,203)
   
    but = e.Form.CreateControl("butadd", ControlTypeEnum.button)
    pnl.AddControl(but)
    but.TopMost = True
End With