How to control Slide changes programatically?

[Rui Feliciano]

Hello all,

I need to disable slide changes during a powerpoint presentation. Basically,
I need to intercept a slide change event and allow/disallow the change to
occur id a certain criteria is met.

I'm using the EventGen12 addin in Powerpoint 2003 and I'm using its
OnSlideShowNextSlide event handler but the problem is that although the
event is triggered exactly where it is needed (BEFORE the slide change)
Powerpoint continues with its slide change and only after it is finished
with that my code is evaluated. I absolutely need to condition slide changed
based on code, is there a way yto do this in Powerpoint 2003 using VBA?

Thanks a lot for your time!

Rui Feliciano