Video output through usb?

A friend phoned for assistance with connecting his MBPro running OS X v10.5.8 to a projector. He has three cables, two with PC connectors to what sounds like a VGA style plug at the projector end, and a third, which he thinks. Was bought to connect the MBP on the last occasion this was needed.
The third cable plugs into the USB slot at the computer end, and into what sounds like a mini USB jack (as found on printers and scanners) at the projector end.
Is this possible? If so, what settings are required to make it work?
TIA
Barry
MBPro, OS X v10.5.8, running MS PowerPoint (version not known)

I guess I'm not sure I understand this answer. I'm looking for a way to connect a cable to the usb port on the Treo 800 and connect on the other end to audio/video jacks. Or send the video out wirelessly. I want to be able to send the video to a larger screen TV or a lcd projector for presentations. I am looking for both the hardware solution and if necessary the software piece of the solution????????
Post relates to: Treo 800w (Sprint)

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9850 needs the latest BIOS version. http://global.msi.com.tw/index.php?func=prodcpu2&prod_no=1443&maincat_no=1
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