vdata_id	IN:	Vdata identifier returned by VSattach
	n_records	OUT:	Number of records
	interlace_mode	OUT:	Interlace mode of the data
	field_name_list	OUT:	List of field names
	vdata_size	OUT:	Size of a record
	vdata_name	OUT:	Name of the vdata

	Purpose	Retrieves general information about a vdata.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) if it is unable to return any of the requested information.
	Description	VSinquire retrieves the number of records, the interlace mode of the data, the name of the fields, the size, and the name of the vdata, vdata_id, and stores them in the parameters n_records, interlace_mode, field_name_list, vdata_size, and vdata_name, respectively. In C, if any of the output parameters are NULL, the corresponding information will not be retrieved. Refer to the Reference Manual pages on VSelts, VSgetfields, VSgetinterlace, VSsizeof and VSgetname for other routines that can be used to retrieve specific information.
		Possible returned values for interlace_mode are FULL_INTERLACE (or 0) and NO_INTERLACE (or 1). The returned value of vdata_size is the number of bytes in a record and is machine-dependent.
		The parameter field_name_list is a character string that contains the names of all the vdata fields, separated by commas. (e.g., "PX,PY,PZ" in C and 'PX,PY,PZ' in Fortran).

	FORTRAN	integer function vsfinq(vdata_id, n_records, interlace, field_name_list, vdata_size, vdata_name)
		integer vdata_id, n_records, interlace, vdata_size
		character*(*) field_name_list, vdata_name