C#读取或设置ScrollLock状态的方法

本文实例讲述了c#读取或设置scrolllock状态的方法。分享给大家供大家参考。具体如下：

c#读取或者设置scrolllock状态，允许滚动状态读取或者设置

using system;
using system.runtime.interopservices;
using system.windows.forms;
namespace robvanderwoude
{
 public class scrolllock
 {
  [dllimport( "user32.dll" )]
  static extern void keybd_event(byte bvk, byte bscan, uint dwflags, uintptr dwextrainfo);
  const int keyeventf_extendedkey = 0x1;
  const int keyeventf_keyup = 0x2;
  public static int main(string[] args)
  {
   try
   {
    bool scrolllock;
    bool newstate = false;
    bool setstate = false;
    bool setverbose = false;
    bool verbose = true;
    if ( args.length > 2 )
    {
     return writeerror("invalid command line argument(s).");
    }
    else
    {
     foreach ( string arg in args )
     {
      switch ( arg.toupper( ) )
      {
       case "/?":
       case "-h":
       case "/help":
       case "-help":
       case "--help":
        return writeerror(string.empty);
       case "/q":
       case "-q":
       case "/quiet":
       case "-quiet":
       case "--quiet":
        if ( setverbose )
        {
         return writeerror("duplicate switch not allowed.");
        }
        setverbose = true;
        verbose = false;
        break;
       case "/v":
       case "-v":
       case "/verbose":
       case "-verbose":
       case "--verbose":
        if ( setverbose )
        {
         return writeerror("duplicate switch not allowed.");
        }
        setverbose = true;
        verbose = true;
        break;
       case "0":
       case "off":
        if ( setstate )
        {
         return writeerror("duplicate argument not allowed.");
        }
        setstate = true;
        newstate = false;
        break;
       case "1":
       case "on":
        if ( setstate )
        {
         return writeerror("duplicate argument not allowed.");
        }
        setstate = true;
        newstate = true;
        break;
       default:
        return writeerror("invalid command line argument "+arg);
      }
     }
    }
    if ( control.iskeylocked( keys.scroll ) )
    {
     scrolllock = true;
     if ( setstate && !newstate )
     {
      keybd_event(0x91, 0x45, keyeventf_extendedkey, (uintptr) 0);
      keybd_event(0x91, 0x45, keyeventf_extendedkey | keyeventf_keyup, (uintptr) 0);
     }
    }
    else
    {
     scrolllock = false;
     if ( setstate && newstate )
     {
      keybd_event(0x91,0x45,keyeventf_extendedkey,(uintptr) 1);
      keybd_event(0x91,0x45,keyeventf_extendedkey | keyeventf_keyup,(uintptr) 1);
     }
    }
    scrolllock = control.iskeylocked( keys.scroll );
    if ( verbose )
    {
     console.write( "scrolllock = " );
     console.foregroundcolor = consolecolor.white;
     console.writeline( ( scrolllock ? "on" : "off" ) );
     console.resetcolor( );
    }
    return ( scrolllock ? 2 : 0 );
   }
   catch ( exception e )
   {
    return writeerror( e );
   }
  }
  public static int writeerror( exception e )
  {
   return writeerror( e == null ? null : e.message );
  }
  public static int writeerror( string errormessage )
  {
   if ( string.isnullorempty( errormessage ) == false )
   {
    console.error.writeline( );
    console.foregroundcolor = consolecolor.red;
    console.error.write( "error: " );
    console.foregroundcolor = consolecolor.white;
    console.error.writeline( errormessage );
    console.resetcolor( );
   }
   console.error.writeline( );
   console.error.writeline( "scrolllock, version 1.01" );
   console.error.writeline( "read or set scrolllock key state" );
   console.error.writeline( );
   console.error.write( "usage: " );
   console.foregroundcolor = consolecolor.white;
   console.error.writeline("scrolllock [ 0 | 1 | on | off ] [ /quiet | /verbose ]");
   console.resetcolor( );
   console.error.writeline( );
   console.error.write( "where: " );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "0" );
   console.resetcolor( );
   console.error.write( " or " );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "off" );
   console.resetcolor( );
   console.error.writeline( "  set scrolllock off" );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "    1" );
   console.resetcolor( );
   console.error.write( " or " );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "on" );
   console.resetcolor( );
   console.error.writeline( "  set scrolllock on" );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "    /q" );
   console.resetcolor( );
   console.error.writeline( "uiet   won't display anything on screen" );
   console.foregroundcolor = consolecolor.white;
   console.error.write( "    /v" );
   console.resetcolor( );
   console.error.writeline("erbose displays the (new) scrolllock key state on screen (default)");
   console.error.writeline();
   console.error.writeline("notes: an \"errorlevel\" 0 is returned if scrolllock is off, 2 if");
   console.error.writeline(" scrolllock is on, or 1 in case of (command line) errors.");
   console.error.writeline();
   console.error.writeline("written by rob van der woude");
   return 1;
  }
 }
}

希望本文所述对大家的c#程序设计有所帮助。