Reference a selected control in a control array.

Can anyone help me?

I'm fairly new to Visual Basic(6) and my problem is this....

I have three option buttons set up as a control array on a form. One will always be selected.

I also have a command button on the form. When I click the command button I want to take a certain action depeding upon the option button selected. I guess that I will have to pass the index value of the option button to the on-click event of the command button but don't know how to do it.

Thanks for looking.