Hi All. I'm trying to get pics difference in %. I tried to use ImageMagickObject.dll as it is fast enough & free under it's license. #include <WindowsConstants.au3> $DllExist = 1 Global $oIM = ObjCreate ("ImageMagickObject.MagickImage.1") If @error OR NOT IsObj ($oIM) Then If NOT FileExists ("ImageMagickObject.dll") Then MsgBox (16, "!", "No ImageMagickObject.dll - work impossible.") Exit EndIf RunWait (@ComSpec & " /c regsvr32 /s ImageMagickObject.dll", @ScriptDir