マルチモニタ関連

http://msdn.microsoft.com/library/ja/default.asp?url=/library/ja/jpgdi/html/_win32_changedisplaysettingsex.asp
http://msdn.microsoft.com/library/ja/default.asp?url=/library/ja/jpgdi/html/_win32_enumdisplaydevices.asp
http://msdn2.microsoft.com/en-us/library/ms903593.aspx
http://support.microsoft.com/kb/306399