int32 Vntagrefs(int32 vgroup_id)
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 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 vntrc(vgroup_id)
integer vgroup_id