Getting ALT text from image library

I'm building a customized banner rotater widget.  I am able to grab the image and the link for that banner, but I am unable to figure out how to grab the ALT text for each image.  I've tried to find resources here in the forums, but they weren't really about just grabbing the ALT text.  How do I go about getting the ALT text?

If you have the Image object, there's a "AlternativeText" property...try that