Hi, I am trying to implement a drag and drop between listboxes.I successfully implemented it using the library from http://code.google.com/p/gong-wpf-dragdrop/.Everything works fine but when i had to call some custom logic which involves some selection changed events also,My ui fails to detect mouse clicks anymore.No control in my hole application responds to mouse clicks..not even close.But i can traverse and edit controls using keyboard.However my ui begins to respond to mouse clicks as soon as i move the mouse manually out of the aplication bounds..such as taskbar or so..What can be wrong..?? I have to click through some messageboxes in the drop operation..can this cause a problem.How can i recover y mouse back..? Please help...