Computer Studio Desk

I have a Window’s Vista laptop computer, how do I take it out of sleep mode?

When I close the lid, it goes into sleep, and when I reopen it, it turns back on. But when I have it plugged in and on the desk and I press sleep, how do I get it out of sleep mode? (Studio 15 laptop)?

Pressing any key on the keyboard should bring it back, or even the power button.

3D Studio Max Project – Computer Desk