dio_property_flags_c

	status.i4.v = dio_property_flags_c(device_indices.i4a.r,
					   properties.i2a.r,
					   property_flags.sa.r,
					   errors.i2a.r
					   [,num_devices.i4.v])

	This routine retrieves property flag information.
	
	device_indices	device index or array of device indices
	properties	property index or array of indices
			(PRREAD -> reading property,
			 PRSET -> setting property,
			(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')
	property_flags	returned property flag values or array of
			property flag values
			(array of structures of type DIO_PROPERTY_FLAGS_DATA)
			(A value of NULL can be passed for this argument
			 if the property flags are not needed.)
	errors		returned ACNET status value or array of returned
			status values
	[num_devices]	number of devices (default is 1)

	This function returns status values as follows:

	OK			success
	DIO_BADARG		invalid property or number of devices
	DIO_MEMFAIL		memory allocation failure
	negative value		other ACNET format error
	positive value		number of devices in error

	This function requires the following include files:

	diolib_h, acnet_errors_h

	Related functions:

	dio_is_knobable_c, dio_is_controlled_set_c, dio_is_controlled_set_list,
	dio_manage_pdbs_c, dio_scaling_len(_c), dio_scaling_length_list_c,
	dio_scaling, error_in_list(_c)

	C/C++ usage:

	static const short	properties = {PRSET, PRSET};
	short	errors[NUM_DEVICES];
	int	status;
	static const int	device_indices[NUM_DEVICES] = {14430, 14431};
	int	num_devices = NUM_DEVICES;
	DIO_PROPERTY_FLAGS_DATA	property_flags[NUM_DEVICES];

	status = dio_property_flags_c(device_indices,properties,property_flags,
				      errors,num_devices);