Outlook.Exe – Entry Point Not Found

I greet everyone at TechyV!
I can't find any resource on the Web for this weird string of numbers regarding the Outlook.exe entry point. This error comes up every time I open MS Outlook 2003. Any ideas that will help fix this? Thanks so much for your expertise.

Error:
The procedure entry point ?SetOnOppOpenCallback@CWBtAPI@@QAEAW4WBtRc@@P6AXPAXJQAEJJ@Z0@A could not be located in the dynamic link library btwapi.dll
