>Good to know somebody has actually done this. I already had the controlsource property defined, and was setting my textbox to it in init. There is no value property in the container class, so I tried adding one as you suggested, but it didn't work. Do you have a sample of this code you might be able to send?
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>Another problem I have with all of this is with navigation. I used my kepress event on the textbox to trap up and down arrows and then issued grid.ActivateCell commands. It works fine until I go beyond the bottom record initially displayed. Then it starts moving me over a column instead of down a cell.
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>Again, thanks for the help.

I do. It is a Calendar control in VFP 6. Since I do not remember if earlier versions of VFP have a Control class, I am e-mailing you the actual code instead of the class.