Hi

I understand that I can set in the url which opens a modal popup, the return url for when a modal is closed.  however I require to go to a url which has a querystring value but I do not know the value until the after the popup is opened. 

How can I set up a button to close the popup and navigate to a new page?

I have tried 
Response.Redirect(Globals.NavigateURL("/mypage"), false);

but this does not produce the desired result.

thanks for the help

Mark