title: C# Drag drop does not work on windows 7
body: <p>I have had a project for quite a while using C# winforms. I implemented a drag-drop function before windows 7 was released. Worked like a charm. However, when using windows 7 it does not work. The event doesn't even get triggered.</p>
  
  <p><code>AllowDrop</code> is set to true. When subscribing to <code>DragEnter</code> it does not get called in windows 7 (not sure about vista). But on XP it works all the way. The program is run with administritave priviliges.</p>
  
  <p>Is there any difference in the drag drop in windows 7 vs xp? Don't know if it's relevant, but I'm using x64</p>