>I have a simple 1-table grid on a form and I want to add a column that calculates an elapsed time from time values in two other fields from the table. I wrote a function that does the calculation, but I can't assign it as Record Source for the column. I also tried the Value property . . no luck. Please help !!!
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>TIA

Put it to Column.Controlsource, the safest way is to do it programmatically, e.g.
***grid.init event
This.Column3.ControlSource="0+Thisform.GetNumofSeconds()"