This may be a big topic, yet it is very important.
I know macro,procedure and function can do this, but don't exactly know how

What do you mean?

Maybe he is thinking along the lines of static libraries.

There exists different calling conventions, which one to choose and why?
Are macros prefered to use than procedures?
Parameters passed may be constant, register or memery, how can the subroutine deal with all the three kinds?

Everyone have an own idea about the subject so we need to talk about personal preferences and why.

You need also to define target OS and application. i.e. see the differences between way-to-do callings in win32, linux, freeBSD, Menuet....

My personal preferences are:
proc: A self-contained chunk of reusable code with a defined function.
params passed in registers only in procs encapsulated within modules.
params passed on stack when proc needs to be called from external modules or interfaces.
params passed on memory locations: never.
macros for very special situations (very difficult to explain) and definitely not for chunks of code.