Dynamic Binding is a concept that applies to Object Oriented Programming. C is not object oriented.
What is it you're trying to do... explain more and maybe we can give you some ideas :)
Objective-C is a language based upon C, with a few additions that make it a complete, object-oriented language.
Objective-C is a language that implements true dynamic binding (which is required for a language to be truly object-oriented). This means that messages sent to an object aren't bound to a specific function implementation in a specific class until the program is actually run. Stating this another way, the programmer does not know how an object will react to a specific message until the program is actually run.