屏幕
如何设置屏幕分辩率? 
------解决方案--------------------http://www.codeproject.com/csharp/CSDynamicScrRes.asp?df=100&forumid=38736&select=800137   
 class User32 
 { 
         [DllImport( "user32.dll ")] 
         public static extern int EnumDisplaySettings ( 
           string deviceName, int modeNum, ref DEVMODE devMode );          
         [DllImport( "user32.dll ")] 
         public static extern int ChangeDisplaySettings( 
               ref DEVMODE devMode, int flags);     
         public const int ENUM_CURRENT_SETTINGS = -1; 
         public const int CDS_UPDATEREGISTRY = 0x01; 
         public const int CDS_TEST = 0x02; 
         public const int DISP_CHANGE_SUCCESSFUL = 0; 
         public const int DISP_CHANGE_RESTART = 1; 
         public const int DISP_CHANGE_FAILED = -1; 
 }