How to create one additional hidden partition in a USB drive

How to create one additional hidden partition in a USB drive "For security purposes I need to locate a additional hidden partition on USB flash drive. The USB drive contains a security application that will check (in code) if the hidden partition exists. If not I will assume that the application is a non valid copy."
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bert [Entry]

"It sounds like you are using this to support an application that you wish to deploy on a flash drive?

This might be a question for stackoverflow, and the Windows API. You can create a partition through ""gparted"" for example, from a Linux LiveCD such as openSUSE. These tools allow you to specify a ""partition type"" of ""hidden FAT"".

Once you have the second partition, there is probably an API to query the partition table, but I don't know of it, and if your application would need Administrative privileges to run.

Even if the app did secure Admin privileges, is it likely or possible that a group policy at large (think domain accounts) may be preventing access to the partition table?"