Code: 
#==============================================================================
# Mouse Script v1  created by: Cybersam, edited by Astro_mech
#==============================================================================

module Mouse
  gsm = Win32API.new('user32', 'GetSystemMetrics', 'i', 'i')

  @cursor_pos = Win32API.new('user32', 'GetCursorPos', 'p', 'i')
  module_function

  def mouse_global_pos
    pos = [0, 0].pack('ll')
    if @cursor_pos.call(pos) != 0
      return pos.unpack('ll')
    else
      return nil
    end
  end

  def mouse_pos(catch_anywhere = false)
    x, y = screen_to_client(*mouse_global_pos)
    width, height = client_size
    if catch_anywhere or (x >= 0 and y >= 0 and x < width and y < height)
      return x, y
    else
      return $m.x, $m.y
    end
  end
  
  def del
    if @oldcursor == nil
      return
    else
      @SetClassLong.call(handel ,-12, @oldcursor)
      @oldcursor = nil
    end
  end
end

$scr2cli = Win32API.new('user32', 'ScreenToClient', %w(l p), 'i')
$client_rect = Win32API.new('user32', 'GetClientRect', %w(l p), 'i')
$readini = Win32API.new('kernel32', 'GetPrivateProfileStringA', %w(p p p p l p), 'l')
$findwindow = Win32API.new('user32', 'FindWindowA', %w(p p), 'l')

def screen_to_client(x, y)
  return nil unless x and y
  pos = [x, y].pack('ll')
  if $scr2cli.call(hwnd, pos) != 0
    return pos.unpack('ll')
  else
    return nil
  end
end

def hwnd
  game_name = "\0" * 256
  $readini.call('Game','Title','',game_name,255,".\\Game.ini")
  game_name.delete!("\0")
  return $findwindow.call('RGSS Player',game_name)
end

def client_size
  rect = [0, 0, 0, 0].pack('l4')
  $client_rect.call(hwnd, rect)
  right, bottom = rect.unpack('l4')[2..3]
  return right, bottom
end
Aber nur so ne kleine Frage am Rande: Wenn du kein Ruby kannst, was willst du dann damit? xD