status.i4.v = dio_is_string_property_c(device_index.i4.v, property.i2.v

	This routine checks to see if a device property is scaled to
	a string value as opposed to a floating point value.
	device_index	device index
	property	property index
			(PRREAD -> reading property,
			 PRSET -> setting property)
	[native_string]	flag indicating whether this property is a native string
			(TRUE -> this property is a native string,
			 FALSE -> this property is not a native string)
			(default is NULL)

	This function returns status values as follows:

	DIO_BADARG		invalid property index passed
	DIO_MEMFAIL		memory allocation failure
	negative value		other ACNET format error
	TRUE			scaled to a string
	FALSE			scaled to a floating point value

	This function requires the following include files:

	cnsparam_h, dbprops_h, diolib_h, acnet_errors_h

	Related functions:

	dio_is_string_transform_c, dio_is_enumerated_property_c,
	dio_is_primary_scalable_property_c, dio_is_display_dec(_c),
	dio_is_display_short(_c), dio_scaling_len(_c),
	dio_scaling_length_list_c, dio_scaling_transforms_c, dio_scaling

	C/C++ usage:

	short	property = PRSET;
	int	status;
	int	device_index = 14430;
	int	native_string;

	status = dio_is_string_property_c(device_index,property,&native_string);