VB6 Custom Hardware Interfacing HELP

Hi All,

This is a complex one so let me try and explain.

I have a machine linked to a custom piece of hardware (PCI card) Cyberview GMHW2301, which connects to an array of equiptment including an LED array, coin acceptor, note acceptor and printer. (this was from a games machine)
I want to interface with the card to read info from the coin reader etc.
In VB I can add a reference to GMHW.exe which contains a Type Library of functions for GMHW2301Lib.
I am guessing that these functions are not stored in the exe and therefore are not usable.
I also have an exe which access all the functions I need but dosent seem to require any external dll (checked with depends) but of course I cant decompile it to get the functions.
Any Ideas how I can either manipulate either exe to reveal a communication method? or even be able to call process or read information from the other exes whilst running?

Thanks