Detecting Ctrl-<Number> in GLUT

I use GLUT to handle keyboard input for Bitfighter. I've built a nice little keyboard event abstraction layer, which works great for most things, but I've run up against a few frustrating limitations.

For example, when Ctrl is pressed, the number keys, plus, minus, and the quote key don't seem to trigger the glutKeyboardFunc() callback.

I realize that GLUT is very limited in some ways, but I was wondering if anyone knows if it is possible to detect the number keys or plus/minus when Ctrl is pressed.

I would consider switching t开发者_开发知识库o FreeGLUT if it helped work around this limitation.

I did a lot of research on this, and concluded it simply doesn't work.

For this reason, and other frustrations, we eventually ported our code from GLUT to SDL.