output peculiarity

For practice I’m writing and compiling mini code samples to get used glut. When I run these programs the window comes up as predicted but no graphics appear unless I hover the mouse pointer over maximize button. Weird. Can anyone help?
Thanks in advance

With that amount of information only guesses are possible. Which code sample is giving you this problem?

you forgot swapbuffers ?

did you use glutPostRedisplay (or something like that, don’t remember exactly the name) after rendering commands; that’s a classic caveat.