What Windows API should I use that will let me:

Get the colour format, frame dimensions, and number of frames in an AVI 
or MPG file.
Request a particular frame number and have it load into memory where it 
can be handled by my program.

Helpful addition:
What would be the basic steps of this process using that API?
Is there a easy set of API calls that would do the reverse (take a frame 
in memory and append it to an AVI file, or — probably more complex — 
replace a particular frame in an AVI file).

Many thanks

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