status.i4.v = dio_get_snapshot_class_c(device_indices.i4a.r,

	This routine returns the snapshot class for a device or a list of

	device_indices	device index or array of device indices
	properties	property index or array of indices
			(If the first value is less than zero, all devices
			 will be requested with a property index which is
			 equal to the absolute value of this argument.)
			(constants are in 'dbprops')
	num_devices	number of devices
	errors		returned error status or array of errors
	[snap_classes]	returned snapshot class code(s) (constants are in 'ftp')
			(default is NULL)

	This function returns ACNET status values as follows:

	OK			success
	DIO_MEMFAIL		memory allocation failure
	negative value		ACNET format error indicating overall failure
	positive value		number of devices in error indicating partial

	This function requires the following include files:

	cnsparam_h, diolib_h, ftp_h, acnet_errors_h

	Related functions:

	dio_ssdn_to_snapshot_class_c, dio_can_snapshot_c,
	dio_can_read_using_snapshot_c, dio_can_trigger_snapshot_c,
	dio_snapshot_class_info_c, dio_build_snapshot_list_c,
	dio_get_snapshot_list_c, dio_get_raw_snapshot_list_c,
	dio_cancel_snapshot_list_c, dio_rearm_snapshot_list_c,
	dio_can_read_using_ftp_c, dio_can_ftp_c,
	dio_ftp_class_info_c, sr_sda_get_snapshot_list_c,
	sr_sda_get_raw_snapshot_list_c, error_in_list(_c)

	C/C++ usage:

	static const short	properties[NUM_DEVICES] = {PRREAD, PRREAD};
	short	errors[NUM_DEVICES];
	int	status;
	static const int	device_indices[NUM_DEVICES] = {7085, 7046};
	int	num_devices = NUM_DEVICES;
	int	snap_classes[NUM_DEVICES];

	status = dio_get_snapshot_class_c(device_indices,properties,num_devices,