Getting Visual Studio
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.
Installing FLTK
FLTK home page
FLTK Programming Manual
FLTK Demo for NT and its sources
FLTK Demo for Linux and its sources
HelpSession: FLTK
Intro to OpenGL
Some OpenGL examples
HelpSession: OpenGL Topics
OpenGL Programming Guide ("The Red Book")
OpenGL Reference Manual ("The Blue Book")