Installing catalog file for FileSpy drivers

Hi, all

I have created test signed drivers (both minifilter and legacy filter).
for FileSpy, to be able to run under 64-bit Vista.
I also have created catalog file and signed it.
Now I want to install them into the system, which also involves
installing the catalog file.

There’s API for it, called CryptCATAdminAcquireContext.
This function has the following prototype:

BOOL CryptCATAdminAcquireContext(
HCATADMIN* phCatAdmin,
const GUID* pgSubsystem,
DWORD dwFlags
);

The “pgSubsystem” parameter is documented as
“Pointer to the GUID that identifies the subsystem”.

Anyone of you knows what does this mean ?

L.