Implementing call back functions effeciantly

Hi All..
I am a novice to C++ and working on one networking project.
In which, some of my application layer functions should be executed
when some event occur in network.

For this, i thought of using callback functions concept.

is it the best way? It will be helpful, if some of  you suggest best
way for such implementation.

If callback concept is best, how i use this efficiently.
it will be helpful, if ypu provide some good URL to study.

Thanks in advance
****va

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