How do you get the closet key in Resident Evil 1?

Right you have to save Barry and Chris if playing as Jill or Rebbecca and Jill if playing as Chris after completion saving them u will unlock the closet key.

The room to use it is armor key door on 1st floor on the right side of the main staircase, follow corridor round to another door and enter right at the end of this room u'll see a mirror and a door on your far right enter and right at the end of clothes you will find the other outfit I've only got Jill's and her outfit is a short black shirt, jeans and trainers.