When I try to get the value for the IsGroupByRows property of the RowsCollection I am getting "Invalid Property name: Property IsGroupByRows not found.."

Here's what I'm using:
Dim IsGroupBy As Boolean = myUltraGrid.GetNAProperty("Rows.IsGroupByRows")

According to the API in the online documentation IsGroupByRows is a public property for the RowsCollection.

However... I am resigned to using the online help for 2007 VOl3 (CLR 2.) because 2007 Vol1 (which is the NetAdvantage version we're using) is not listed under availble online documentation.