func init
	// checks installation Adobe Photoshop and adds references
	include("AdobePhotoshop")

	// initialize instance
	sys.add_object(this.codename, 'ps.PNGSaveOptions')

	// initialize properties
	sys.set_typed_field(1, 'Compression')
	sys.set_typed_field(104, 'Interlaced')

	// make methods for properties
	sys._prop_init('Compression', 0, 1, 1)
	sys._prop_init('Interlaced', 0, 1, 104)
end

func SaveOptions
	return(this.codename)
end