[Wintermute0110]

Your solution works directly in the launcher but not in my script even with $rombasenoext$ in the laucher argument...
What do you think ?

Have a look at the Command Line Parameters of Autoit.

If you configure your launcher like this

Code:

run "C:\VMs\CPS3emulator 1.0a\emulator.exe" -nowindows $rombasenoext$

Then modify your script to something like this

Code:

$emuExe = $CmdLine[1]
$romName = $CmdLine[3]

HotKeySet ("{ESC}", "Terminate")

Send ( "#{F9}" ) ; disables Kodi focus in Launcher4Kodi
Runwait ($emuExe  $romName)

Func Terminate ()
    ProcessClose ( $emuExe )
;~     WinSetState("Kodi", "", @SW_MAXIMIZE) ; active if Kodi in windowed mode
    Send ( "#{F9}" ) ; actives Kodi focus in Launcher4Kodi
    Exit 0
EndFunc

I have never used Autoit or tested the code, but I think you get the idea.