> Are you using C# or VB .NET...I seem to remember some problem with VB .NET in this area. Anyway, why don't you send me your form via private e-mail.

Hi Kevin

I'm using C#...
I just sent you a new created project by e-mail. There are just two forms one with just the mmDataGridView, and the other as a subclass of the first... In the subclassed form all properties of the mmDataGridView are gray...