How do you select a layer outline in Photoshop on a PC?

So to explain what I actually mean: On a Mac, you can hold down the Apple button and click on a layer, and it selects the outline of everything in the layer. It’s the equivalent of using the wand tool to select everything in the layer. I can’t seem to figure out how this is done when i’m using my PC. I’m sure it must be something simple and I’ll feel silly after, but does anyone have thoughts? Oh – for the record the versions are Photoshop CS on the Mac and CS2 on the PC… but I can’t imagine that it’s a feature they would have dropped. Thanks in advance. -e