>I don't see DblClick as a property of the column. Would it be the individual entry (text1 or icon1)? And would this work if the grid's AllowCellSelection property is set to .F.?

Unfortunately, it will not go nice with AllowCellSelection=.F.
You may still check for MCOL(0,3) in Grid.DblClick event, and 'calculate' which column it is, by using Grid.Left and Column.Width properties