How to determine the Office XP service pack level?

[CR]

We're writing an application in C# that needs to programmatically check if
Office XP is installed on the computer and, if so, what service pack level
is it at. Another application that we have requires a minimum of Office XP
SP3, so we need to check the service pack level and make sure it's at least
SP3.

Does anyone have any ideas on:

1. How to write C# code to check if Office XP exists on the computer?
2. How to write C# code to check the service pack level of Office XP?

Thanks in advance.

 

[Bonj]

Have a search through the settings in regedit, it'll be hidden in the
registry somewhere. You can search through the registry.