Description of Functions for Win32 Assembly, any sources?

I'm looking to start doing Win32 Assembly language, and am trying to locate a good source that explains what most of the common functions do. Anyone here know a good online source or a good book even that has this?

Here are some links that may be helpful;
http://vx.netlux.org/~vorgon/article2.htm
http://www.geocities.com/SiliconValley/Lab/1563/assembly.html