This program is meant to be configured as picture viewer in directory tools like DirOpus or DosControl. It shows the doubleclicked picture in a borderless window on the specified custom screen. The remarkable about this program is that it reads the whole directory the picture is in and you can then choose other pictures out of this directory from a menu or by pressing the cursor keys.
PicShow can also be used as a simple slide show program. It can display pictures either in sort order or randomly. When run on its own screen there are also some nice blend effects.