I\'ve WPF application which has one Main window on which I\'m opening a Popup window. The problem I\'m facing is the Popup window always stays on top. If I open some other a
H.B. is correct - WPF Popup control was not intended do be not top-most. On the other hand - check out the following blog post on using user32 for achieving your goal:
http://chriscavanagh.wordpress.com/2008/08/13/non-topmost-wpf-popup/