static unsafe void Main(string[] args) { MouseOptions m = new MouseOptions(); MouseOptions.GetDefaults(); int speed; SystemParametersInfo(SPI_GETMOUSESPEED, 0, new IntPtr(&speed), 0); Console.WriteLine(speed); MouseOptions.SetDefaults(); SystemParametersInfo(SPI_GETMOUSESPEED, 0, new IntPtr(&speed), 0); Console.WriteLine(speed); Console.ReadLine(); }