>How do you add a property to a grid in design mode?
As far as I know, in design mode you can't add properties to an object contained in a form, only to the form itself. However, you can do one of the following:
a) Add properties at runtime.
b) Add properties to a grid class, and add an instance of this class to the form.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)