title: Creating a control that will allow a user to draw a circle on a map and return the zip codes found in that circle
body: <p>I am working on Windows Forms C# .Net 4.0 application and have a request to create a controls that:</p>
  
  <p>Displays a map, hopefully current from Google Maps/Bing etc. that will allow the user to scroll and zoom</p>
  
  <p>Allows a user to draw a shape on the this map, a circle at a minimum but a square or free form would be nice</p>
  
  <p>Return the zip codes found in that shape for use by the application</p>
  
  <p>I have been searching for .net map controls and most refer to asp.net controls, of the ones that seem to be for windows (GMap.net, SharpMap) it is not clear to me that I can do what I am trying to with these libraries. An opensource would be nice but buying a licence is not out of the question. Anyone who can point me in the right direction would be appreciated.</p>