dynamically add controls to gridview

[blar9]

I have several dynamically created grids that I want to put into another grid so they have a grouping. Below is a sample main grid that I need to add another grid into the itemtemplate.

<asp:GridView ID="gvMain" runat="server" Width="90%">
<Columns>
<asp:TemplateField HeaderText="A">
<ItemTemplate>
</ItemTemplate>
</asp:TemplateField>

<asp:TemplateField HeaderText="B">
<ItemTemplate>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

I have been able to create the colums using:

Dim customField As New TemplateField

customField.ItemTemplate = New GridViewTemplate(DataControlRowType.DataRowaRow, "1")

customField.HeaderTemplate = New GridViewTemplate(DataControlRowType.Header, "HeaderTest")

gvMain.Columns.Add(customField)


After the column is added I can see that it exists with gvMain.columns.count but how do I put a grid or any other control into that column?

Thanks!!!!