A family of Microsoft relational database management systems designed for ease of use.
As a developer you need to always develop for the lowest common denominator. So if you have user running at say 600x800, then you need to mod you resolution to emulate it and then work within those limits knowing that if it fits on the lower resolutions, it will also work on the higher one.
If you want to make your application dynamically adapt to each user's resolution, then you'll need to purchase a tool, such as: http://www.peterssoftware.com/ss.htm