The xbmImage() constructor takes the width and height of the image, in pixels, as parameters. An optional initial value can also be specified-if supplied; this will create a pattern of vertical lines in the image. Otherwise, a zero is assumed, which results in a blank image.
The xbmImage() constructor calls the xbmRow() constructor to create each row in the image. xbmRow() should be considered an internal function. You don’t need to call it directly.
Ananova 