Thank you both very much for the information!!!

Two minor questions:
When one declares the class/ procedure - does this have to happen on each computer on which the specific power point presentation is run, or is the 'initialization' process coded into the PPT/ PPS itself?

Also, the function 'OnSlideShowPageChange()': Where can I place this function (I apologize if these are ignorant questions, but I have tried several functions which did not react)? Is it feasible to open Microsoft Script editor and inserting the function in the <Head> portion?

Again, thank you - this is helping immensely!