File list (Check if you may need any files):
showdepth
.........\Debug
.........\differential.frag
.........\glext.h
.........\glsl.cpp
.........\glsl.h
.........\glut.h
.........\glut32.dll
.........\glut32.lib
.........\main.cpp
.........\roberts.frag
.........\scene.cpp
.........\scene.h
.........\showdepth.dsp
.........\showdepth.dsw
.........\showdepth.frag
.........\showdepth.ncb
.........\showdepth.opt
.........\showdepth.plg
.........\showdepth.vert
.........\sobel.frag
.........\trackball.cpp
.........\trackball.h