Question : asp.net + modal popup

I have a gridview that is pouplated when the users clicks on a linkbutton in another gridview - i want to have a modal pop for another gridview when the user clicks on a linkbutton

so there are 3 gridview - 1st one user click, creates 2nd one, when they click on linkbutton in 2nd one, i want the 3rd gridview to open in a modal popup

what would i put as the TargetControlID as the 2nd gridview has not been created yet.

Answer : asp.net + modal popup

That would require PayPal to change their procedures and I don't think they will do that for you.