blank output window

Hi there!
Im new to openGL, I coded a simple code, (lines, dots, exc…) but the output window is always blank.
the same code works on other computers, so there is no problem with the code.
where could be the problem?
(maybe glut.h glut.lib and glut.dll files, but i replaced them already)


Can you post your code here…so that i can Help…even i am the beginner for this OpenGL…
I am using Glut on Windows platform