Sorry, I forget to tell that I'm working on windows XP.
It sounds stupid why making a batch file on XP, but its for something special.
I have read somewhere that the command for to close something is /CLOSE.
But I cant use that command to close my music file.
I am trying to close the complete media player with that command, but that didn't work either.
Maybe this is the right command, but I'm using it wrong.