Disallow Editing Specified Cells in a Datagrid

[Ray]

Does anybody have a way to disallow double clicking specified cells in a 
datagrid to edit them while continuing to allow the majority of cells to 
be edited?

I'm currently catching the preOpenFieldEditor message and then sending 
my own handler which discontinues field editing after it has begun, but 
by that time the user has already opened the cell editing field.  This 
looks shabby (when I close it back up) and it might not work well on 
slower processors.

I'd prefer to not let the editing process get started in the first place.

Thanks,

Ray Horsley
LinkIt! Software