When I drag a control onto my designer from the toolbox, it works great. I can add sub-controls etc. If I save and close the form, then reload it, all the panels/groupboxes etc do not accept controls being dropped onto them anymore, the controls simply drop to the main surface (behind the container control).

In my BasicDesignerLoader, in PerformLoad, I loop through my data and create my controls. I do something like the following:

Protected Overrides Sub PerformLoad(ByVal serializationManager As System.ComponentModel.Design.Serialization.IDesignerSerializationManager)

Dim component As IComponent = LoaderHost.CreateComponent(GetType(RootControl), "Form")
Me.SetBaseComponentClassName("Form")

'Load my data Object

Dim tempControl As someDataType
For Each tempControl In myDataObject.Controls
CreateControl(tempControl, CType(component, Control))
Next

Me.LoaderHost.EndLoad("UserControl", True, errors)
End Sub

Private Sub CreateControl(Byval controlObj as someDataType, ByVal parent as Control)
'Figure out the type

Dim newComponent as IComponent = LoaderHost.CreateComponent(myCtrlType, controlObj.name)
ctrl = CType(newComponent, Control)
ctrl.parent = parent

'Set the user entered properties

Dim tempObj as someDataType
For each tempObj in controlObj.Controls
CreateControl(tempObj, ctrl)
Next
End Sub

Hi,

Did you check http://msdn.microsoft.com/en-us/library/3bthc7h2(VS.80).aspx

I think you need to pass True.

Martin