How to make Powerpoint retrieve images

Hi all,

I am trying to build a powerpoint slide show that has a web image on a slide.

The website refreshes the slide with a new image (maintaining/overwriting the same filename) every minute.

I can assemble the slide in principle by 'inserting a picture from file' and declaring a URL, however, the image is gathered at this exact time and is never 'retrieved' again.

is there any way, an attribute, a little snippet of VB or something to let me get the latest picture from the website when the slide rolls through?

Would appreciate any help...

Steve