How does one manage files with separators?

[nimennor]

Hi,
        I'm working on a little project, and I
        got stuck on a problem.  So far, I
        already have interface, and the rest
        created, now, all I need, is a way to
        retrieve information from a file.
        
        A file will consist of 
        
        <Field name>:<Value>
        <Field name>:<Value>
        
        the ":" in the middle is the separator,
        and <Value> can be either numbers or
        characters.
        I can figure it out, how to store the
        both variables once retrieved ( I plan on
        using struct ), all I need a sample on
        how to read the file, and retrieve both
        <Field> and <Value>

        Any advise?

Thank you very much,
Nikita.

P.s.  Does anybody know of a program I can
use as an example ( with source, of course ).