vgroup_id

IN:

Vgroup identifier returned by Vattach

	Purpose	Returns the number of objects in a vgroup.
	Return value	Returns 0 or a positive number representing the number of HDF objects linked to the vgroup if successful or FAIL (or -1) otherwise.
	Description	Vntagrefs returns the number of objects in a vgroup identified by the parameter vgroup_id.
		Vntagrefs is used together with Vgettagrefs, or with Vgettagref to look at the data objects linked to a given vgroup.

	FORTRAN	integer function vfntr(vgroup_id)
		integer vgroup_id