>You can use Column.Bound= .t., Column.Sparse=.t., Column.ControlSource="MyFunction()", where MyFunction is defined anywhere in app code for field value translation.Works perfectly.

Thanks for the response, Sergey, and glad to know that that works well. So the problem is reduced to allowing input in the same column (but not necessarily in the same textbox, as Naomi suggested in another message). Do you know the answer to that?

As mentioned before, the goal is to use a specialized textbox in the the grid to show and accept time in "hh:mm" format and move it to / from file as a numeric value. The textbox class does the conversion well on the form but not in the grid. The function can be replicated as a form method.

Do you have any suggestions?

Thanks.

Alex