I'm editing my question below because I figured it out. (DUH.)  I just did this:

DataRow row = dsEmps.Tables["Employees"].Rows[rowIdx];

UltraGridColumn col = this.ultraGrid1.ActiveCell.Column;

I case someone else is having trouble starting their brain, I'll leave this post. 

Hello;

I read an earlier post that addresses this, http://forums.infragistics.com/forums/p/1268/11721.aspx, but can't believe that the UltraGrid falls short of Microsoft's DataGridVIew as far as cell and row ErrorText support goes. 

I'm trying to show an error icon, !, in a cell and a row, like you can do with the ErrorText property of the Infroagistics ErrorEventArgs class or the Microsoft DataGirdViewRow class.  My grid is bound to an ADO.Net Datatable. I see how to get the error icon in the Error event of the grid, but that's for errors from the underlying data source or a mask.  Is there a clever/simple way to get a little error icon and associated tooltip when a business level validation edit is violated?

Thanks,

Bill