Visual Studio 2013
Microsoft as part of its academic alliance with UW provides Visual Studio (2013 edition) at no cost to students. You can get it by going to DreamSpark. You will need to create an account using your first name, last name, and birth date as it is registered at UW. You should also use a washington.edu email account (such as your CSE email account). DreamSpark will verify this information with UW (a relatively quick process), then you will be able to download Microsoft development tools using DreamSpark.
Do you have the windows SDK too? If the visual studio install did not install the SDK, then you might run into errors of the sort gl.h ot glut.h not found. Installing the Windows SDK will help.
FLTK home page
FLTK Programming Manual
FLTK Demo for NT and its sources
FLTK Demo for Linux and its sources