VSQ - Vdata Query Interface

VSQuerycount/vsqfnelt	Retrieves the number of records in a vdata.
VSQueryfields/vsqfflds	Retrieves the names of the fields in a vdata.
VSQueryinterlace/vsqfintr	Retrieves the interlace mode of the vdata.
VSQueryname/vsqfname	Retrieves the name of a vdata.
VSQueryref/vsqref	Returns the reference number of a vdata.
VSQuerytag/vsqtag	Returns the tag of the specified vdata.
VSQueryvsize/vsqfvsiz	Retrieves the size of a record in a vdata.