vgroup_id	IN:	Vgroup identifier returned by Vattach
	tag	IN:	Tag of the object
	ref	IN:	Reference number of the object

	Purpose	Checks whether an object belongs to a vgroup.
	Return value	Returns TRUE (or 1) if the object belongs to the vgroup, and FALSE (or 0) otherwise.
	Description	Vinqtagref checks if the object identified by its tag, tag, and its reference number, ref, belongs to the vgroup identified by the parameter vgroup_id.

	FORTRAN	integer function vfinqtr(vgroup_id, tag, ref)
		integer vgroup_id, tag, ref