Hi, buddies!

I have a great doubt here:

I'm creating a class based in a form, and into this form will be a Grid control. When an user click in a header of that grid, I need to run a code. This grid will be populated only in run-time, with the content of a table. Well, in interactive design, I never know how many columns I'll have in my grid. So, how can I write a code to a header that does not exist? How my code can be generic in this case?

Thanks in Advance