DisplayDeivce should have a method for tool application's window

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I want to use n3 as the base library of a tool application, which is build 
with MFC/CLR. But I have to change the code of Win32DisplayDevice to 
render things in another window in MFC/CLR. The InputServer also do not 
provide friendly interface to use child window's handle(HWND).

although i can edit the code by myself , i think n3 should have those 
code, then someone can write many tools for n3. ^_^

Original issue reported on code.google.com by [email protected] on 22 Nov 2008 at 2:49