[thelist] DataGrids: Standard vs Webmatrix

[Casey]

I'm noticing that datagrids build in WebMatrix have their own namespaces
which are imported with the <%@ Register TagPrefix="wmx"
Namespace="Microsoft.Matrix.Framework.Web.UI"... declaration.

In a standard datagrid (not build in WebMatrix) you can discover the value
of the ButtonColumn the user has clicked as follows:

Sub Show_Details(a As Object, e as DataGridCommandEventArgs)
Dim getDoc as Integer = gridDocs.DataKeys(CInt(E.Item.ItemIndex))

But, when the datagrid was build in WebMatrix, this same line returns an
error:

 'DataKeys' is not a member of
'Microsoft.Matrix.Framework.Web.UI.SqlDataSourceControl'.

Any idea what the correct WebMatrix syntax would be?

TIA

Casey