Where can I get example programs for opengl callback functions?

I want to learn example programs for callback functions like-:

1) glutReshapeFunc().

2) glutKeyboardFunc().

3) glutMouseFunc()

4) glutMotionFunc()

5) glutPassiveMouseFunc()

6) glutIdleFunc()

7) glutIdleFunc().

8) glutMouseFunc(myMouse)

9) glutDisplayFunc()

Where can I get example programs for them only?

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