How do i make a fullscreen computer game into a smaller screen?

Okay, i have a computer game that i really wanna play, but I do not want to get off MSN as well. So I want to make the fullscreen game become a smaller screen. The size I wish to make it about half of the screen, and i know you can do this, because i have done this with some MMORPG (Ragnarok Online). How do i do this? PLEASE HELP!How do i make a fullscreen computer game into a smaller screen?
Not all games support playing in a windowed mode.

But you might try pressing Alt+Enter while the Game is running.

Make sure the game has a smaller resolution than your desktop screen.



If nothing happens, then the game can only be played fullscreen.How do i make a fullscreen computer game into a smaller screen?
use the menu on you computer screenHow do i make a fullscreen computer game into a smaller screen?
At fist you should tell the person who read your queston what game you are playing.

then they can help you to solve your question.
download dxwnd try google or here maplebound.com

and go to the downloads at the top. this program lets you play fullscreen games windowed.