We currently have an extended webgrid which we do several things onInitialize etc.  For this grid I would like to set up in cell editors such as a webDateChooser, a dateTimeMask and an infragistics TextBox.  This works fine when putting the controls on the page and binding columns to the control id's.  However, I would like the grid itself to render all of these controls automatically so that other developers will not have to worry about adding extra controls and binding the columns.  I am overriding the Render control to try and render these three controls to the page.  It seems to be rendering to the page correctly but does not seem to be functional.  The webDateChooser for example does not contain the drop down arrow and is not masked via the javascript.  The following methods have been attempted.

Protected Overrides Sub Render(ByVal output As HtmlTextWriter)
mdmkGridDateMask.RenderControl(output) 
mtmkGridTimeMask.RenderControl(output)
mtxtGridTextArea.RenderControl(output)
MyBase.Render(output)
End Sub

Also, me.RenderChildren was also considered but the me.Controls collection seems to be empty when the Render function is called.

Private sub onInit(...) Handles Me.Init
//Initialize and add control to control collection here
end sub

Private Sub CustomizeColumns()
Dim colColumn As UltraGridColumn

For Each colColumn In myGrid.Columns
Select Case colColumn.BaseColumnName
Case "TestColName"
colColumn.AllowUpdate = AllowUpdate.Yes
colColumn.DataType = "System.DateTime"
colColumn.Type = ColumnType.Custom
colColumn.EditorControlID = myGrid.GridDateMask.UniqueID

End Select
Next
End Sub

Are there any suggestions about how I can get this to work properly?

Thanks,
KyleL