When passed the current temporary image and the image that will become the new temporary image this disposes of the old temporary image and returns the new one. Can cope when the same image is passed across for both the temporary and new image.

Image UseImage(
	Image tempImage,
	Image newImage
)

Function UseImage ( 
	tempImage As Image,
	newImage As Image
) As Image

Image^ UseImage(
	Image^ tempImage, 
	Image^ newImage
)

abstract UseImage : 
        tempImage : Image * 
        newImage : Image -> Image