Take a look at this example:
Copy slides with source formatting
http://skp.mvps.org/pptxp001.htm

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Regards,
Shyam Pillai
Animation Carbon
http://www.animationcarbon.com
> I'd like to programmaticaly copy individual slides from one presentation
> that
> I'll call oPPs, and append it to a presentation called aPPs (my active
> presentation). I can identify the slide id's that I want to copy, but am
> unsure how to code the copy and append part. Can someone assist?