pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreQueryEngineVersion.

rc (LONG) - returns

Return codes.

GreQueryEngineVersion returns the engine version number (lVersion), or it returns GPI_ALTERROR if an error occurs. For example, it might return 0X000000200L = 2.0.