What is OriginX for and is it really neccesary? It seems to me that it just states the column index but why would this have to be manually assigned. I would think the order of the columns would naturally set their indexes.
<RowLayoutColumnInfo OriginX="1" />
The OriginX property is primarily used with the multi-column header functionality of WebGrid. You can find more information about this feature in this article from our online help documentation of NetAdvantage for .NET 2008 Volume 3:Using a Multi-Column Header