Peter,

>Since The mmDataGridView does not support a mmPicker as a mmGridColumnDefinition, I hesitate in using a mmDataGridViewComboBoxColumn as column defintion. The list, derived from a database table, is rather long. I like to use something similar to a mmPicker to allow the user to select and item from a list on another form and have that selected value returned as the cell's value. This is only in EDIT mode only.
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>One approach I was thinking is to use mmDataGridViewtextBoxColumn. The user can DoubleClick on the cell to popup a mmPicker. From there, the user will select the value and close the Picklist to return the value to the textbox.
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>I am sure there has to be a simple solution to this problem.

It sounds like you've come up with a good solution since the picker control is too complex to be contained within the DataGridView. Popping up another form makes sense.

Best Regards,