Hey Ho Keith Rome

here is a very basic Sample how to do something like this.
GetView(ViewTechnology.WindowsForms) is the magic Word in the Code.

The rest works like any other Designer.

First Create a Component:

<Designer(GetType(SqlFormRootDesigner), GetType(IRootDesigner))> _
Public Class SqlForm
   Inherits Component

End Class

The Create a UserControl. The User Controls is later shown if you open the
File

Public Class SqlFormView
   Inherits System.Windows.Forms.UserControl

#Region " Windows Form Designer generated code "

bla bla

End Class

'Then Create the Root Designer for the Component

Public Class SqlFormRootDesigner
   Inherits System.Windows.Forms.Design.ComponentDocumentDesigner

   Private mComponent As SqlForm
   Private mComponentView As SqlFormView
   Private mHost As IDesignerHost

   Public Overrides Sub Initialize(ByVal component As
System.ComponentModel.IComponent)

       MyBase.Initialize(component)
       mComponent = component
       mComponentView = New SqlFormView
       mHost = Me.GetService(GetType(IDesignerHost))
       AddHandler mHost.LoadComplete, AddressOf HostLoadComplete

   End Sub

   Private Sub HostLoadComplete(ByVal sender As Object, ByVal e As
EventArgs)

       Dim designContainer As Windows.Forms.Control
       Dim rootDes As IRootDesigner

       rootDes = Me
       designContainer = rootDes.GetView(ViewTechnology.WindowsForms)
       mComponentView.Dock = DockStyle.Top
       designContainer.Parent.Controls.Add(mComponentView)

   End Sub

End Class

Now you can Inherit a Class from "SqlForm"
and the GUI of the UserControl will be shown.