Low Level read/Write code for USB storage device

Hi all,

I plan to code for a kind of "USB Stick cloner" running on Windows, that is to make an
image of the entire content of a USB Storage device, in order to copy it
to another USB stick.

I'd like to read low level information about partition table,
catalog, etc.. and of course, to copy this information to another stick.

I didn't find nothing useful in the Xojo forum nor in MBS samples.

After a lot of searches on Internet (information like APIs, Command Line tools, shared code, ...), I'm now interested in an open-source utility, Clonezilla, which does all I need.

Does someone know and/or use this utility?
My goal is to adapt its source for my own needs, including it in a Xojo app.

Thanks for any help.

-- 
Jean-Luc Arnaud