mouse input/aiming FPS style using glut
I'm trying to work on a simple FPS style game (only aiming, no translational movements) and I'm having a hard time with getting the correct mouse interaction. Mainly I don't know how to set it up where the mouse cursor/crosshair stays in the center of the window while the scene rotates (currently I can move around, but once the mouse cursor gets to the edge of the screen it stops, and it's annoying to have the cursor moving around). I know there are functions like glutWarpPointer and SetCursorPos, but then I can't seem to move at all.
Can anyone help point me in the right direction, or is this an effort in futility with glut? Thanks for any help.