status.i4.v = dio_can_snapshot_c(device_indices.i4a.r,
					 can_snapshots.i4a.r, errors.i2a.r

	This routine determines whether or not a device or a list of
	devices can be read as a snapshot buffer of values.  Please,
	note that this routine only returns information for the
	reading properties of the requested devices.

	device_indices	device index or array of device indices
	can_snapshots	returned snapshot capability or array of returned
			(TRUE -> device can be read via a snapshot,
			 FALSE -> device cannot be read via a snapshot,
			 DIO_INVALID_DATA -> error occurred in reading data)
	errors		returned error status or array of errors
	[num_devices]	number of devices (default is 1)
	[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_can_read_using_snapshot_c, dio_get_snapshot_class_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_get_ftp_class_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:

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

	status = dio_can_snapshot_c(device_indices,can_snapshots,errors,