Frame popup - opening and closing?

Hi There,

Apologies to those who may percieve this to be a simple question, but I'm new to WPF and browser based development.

I'm writing a program with one main window.  The design team want all of the maintenance pages (i.e. upload document, change doc name etc) to be displayed as popups.  I thought a nice way to do this would be to display the page in a frame and change the visibility to 'visible' on a button click as it would be quick (i think).  So I have a couple of qustions:-

1. I have come across a problem, in that I cannot work out how to hide the frame again.  any help would be appreciated....

2. Then I questioned whether or not I'm taking the best approach to this problem.  The design team want to have a pop up that is similar to the glass effect covering the main window (so it can't be clicked on until the user decides to close the frame and go back to the main window).

If anyone can provide guidence I'd be very grateful.

Thanks,

Tim