similar question:

how to make ambient shell output window autoclose? for example if i extract an lha the an output shell window will open with progres which is fine but i have to close it every time by hand. i know it has to do with some auto|close argument but couldnt make it work yet. anyone could help pls?:)

right now this is command from the ambient mime prefs regarding lha:

lha -I x %sp `requestfile DRAWERSONLY TITLE "Kicsomagolás ide..."`