(IN) Points to the extension handle received from the
NWRegisterNCPExtension function.
Return values
0
(0x00)
SUCCESSFUL
The extension was deregistered
255
(0xFF)
ERR_NO_ITEMS_FOUND
The extension has already been deregistered
Notices
NWDeRegisterNCPExtension and NWRegisterNCPExtension are
the two functions that are used by the service-providing NLM applications
to register and deregister NCP Extensions.
When an NCP Extension is registered with NWRegisterNCPExtension,
the address of the queryData pointer is passed as one of the
parameters. This pointer is then initialized to point to a 32-byte area of
memory that the service provider can use to place data in. This
queryData pointer is also used as a handle for deregistering
the NCP Extension.