title: DragDrop registration did not succeed exception
body: <p>I launch a dialog from out of proc COM server, the dialog has some drag drop ctrl operations within it. After some research found that the dialog has to be launched in  STA thread. I managed to do that but there were several side effects on subsequent dialogues. So, planned to implement Dragdrop operation without using the inbuilt one. ie. By handling mouse events and switching cursors, weather this is feasible.?</p>