>Must stick with 3.0b as endusers still using Win 3.1 systems. Can this be programatically emulated? Anyone done this?

Since that property doesn't exist in 3.0, what will happen if you do it in the AfterRowColChange() is that the input mask will not only refresh for the actual row but for the entire grid as well which mean some data may look weird on other rows because you only want the actual row to benefit of the new input mask.

What I did in 3.0, was to call a form to enter the value of the field from the SetFocus() event. So, no keyboard value was able to be keyed from that field. I was only showing the value so it was ok.