Constants (GVL)

InOut:

Scope	Name	Type	Initial	Comment
Constant	gc_hINVALID	HANDLE	0	Invalid Handle
	gc_pNULL	PVOID	0	Invalid Pointer
	gc_szZERO	SIZE	0	Invalid Size
	gc_ctMAX_COUNT	COUNT	-1	Invalid Counter Value
	gc_idMAX_IDENT	IDENT	-1	Invalid Key Value