public static void RubberBandStretcher_CalculateStretch(IntPtr rbs)
 {
     if (IntPtr.Size == 8)
     {
         RubberBandNativeMethodsx64.RubberBandStretcher_CalculateStretch(rbs);
     }
     else
     {
         RubberBandNativeMethodsWin32.RubberBandStretcher_CalculateStretch(rbs);
     }
 }