Hello all, Here is an update of this topic: I did the transition based on a real time input. Thus, if you put 200ms the transition will be made in reel 200ms (+~10ms on my PC) From my first post (see link) just replace: For $a = 0 To 254 Step $speed WinSetTrans($hGDI[$d], "", $a) Sleep($delay) Next by: $ms = 200 ; set your time (ms) $step = $ms/255 $TimerInit=TimerInit() $i=1 $p = 1 $Diff=$step $TimerInit2=TimerInit() While 1 If $i > 254 Then ExitLoop If $Diff >= $s