Microsoft - User Interface Design

A good source of basic information if you have not already seen this site ...

"User experience and interface design in the context of creating software represents an approach that puts the user, rather than the system, at the center of the process. This philosophy, called user-centered design, incorporates user concerns and advocacy from the beginning of the design process and dictates the needs of the user should be foremost in any design decisions."   continued ...   (Via Microsoft)