Compares two bitmap bitwise for difference and returns 0 or 1 accordingly.   _ASM_BitCompareBitmapsMMX.au3 #include <AssembleIt.au3> ;~ #include <GDIPlus.au3> #include <ScreenCapture.au3> _GDIPlus_Startup() Global Const $hGDIBitmap1 = _ScreenCapture_Capture("", 0, 0, 199, 199) Global Const $hGDIBitmap2 = _ScreenCapture_Capture("", 0, 0, 199, 199) ;~ Global Const $hGDIBitmap2 = _ScreenCapture_Capture("", 0, 10, 199, 209) ;ju