The TAPICLIENT_Load function is called after TAPI has loaded the Client Management DLL (through a call to LoadLibrary).
Every Client Management DLL must export TAPICLIENT_Load.
LONG TAPICLIENT_Load(
LPDWORD lpdwAPIVersion,
DWORD dwReserved1,
DWORD dwReserved2,
DWORD dwReserved3
);
Reserved parameter. This value is 0.