opengl, glut using fltk tool kit

well I am trying to configure a sun solaris machine. I need to use opengl using FLTK ie
the Fast Light Tool Kit. I have included the necessary header files in the standard hello world program, yet there are some errors that I am getting.Could any one give me a step by step procedure of all the header files and library files i would need to configure my sun solaris machine for usage with regards to opengl (with glut using fltk.)
further details regarding the fltk and hello world program can be obtained at The sample error message that I get is:

opengl1.cpp:33: Window' undeclared (first use this function) opengl1.cpp:33: (Each undeclared identifier is reported only once for each function it appears in.) opengl1.cpp:33: window’ undeclared (first use this function)
opengl1.cpp:33: syntax error before (' token opengl1.cpp:35: Widget’ undeclared (first use this function)

opengl1.cpp is the name of the program.

Hi !

The Window and Widget classes is from the fltk library (I guess) so you might be missing some header file, make sure you have included fltk.h or whatever the name is in all source files that use fltk.