Multiple access to filemon.

When a Filemon(of sysinternals.com) is active, i want to communicate with
filemon by using another GUI(produced by myself).
By the way, if i get a handle of filemon in my GUI by calling CreateFile,
error is returned.

What is the reason of this problem?
How can i communicate with filemon in my GUI?

Thanks for any suggestions!
Sincerely!

Chang Sung, Jung.