Marcia's way can't let you customize your grid at design time. write that class as .prg file and add your grid as memberclass:

If you had read my reply, you would see that I did suggest writing a class:

However, you can also do this at design time using the ADD OBJECT clause of the DEFINE CLASS command in the class definition of your custom column class.

Thank you so much for providing the example of how to do so < s >