VBA timer in PowerPoint (when slideshow is running)

Can I somehow set a timer interval for a slide in powerpoint, and then have the timer event set the text of a textbox to: Format(Now, "hh:mm:ss")

The code should be executed when I show the first slide in the slideshow. (similar to form load)

What I want to do, is have the first slide in the slideshow count down to briefing start, and then automatically advance to the next slide and kill the timer when the preset time is reached ...

Thanks everyone :wave:

Steff