I have created an App in Excel that I would like to display the
"Window Caption - MyApp Name" instead MyApp filename and " - Microsoft
Excel" in the Title Bar.

Is there a way to update the "HKEY_CURRENT_USER\Software\Microsoft
\Office\12.0\Excel\ExcelName" registry key everytime the app opens?

I can't even manually set it in the regitsry and open Excel. The key
automatically resets to "Microsoft Excel" after the file loads.
Thanks!