[TYPO3] connecting to a foreign database

[PEF]

Hi,

I'm working on an extension where I have to get some data from a MSSQL 
database. For that purpose I've created a class much similar to the DB 
class used by Typo3.

What I would like to do is to:
- define a variable $GLOBAL['MSSQL_DB'] to hold my connection to the 
database
- include my mssql-class, so that I can use it in the same way, that I 
use the $GLOBAL['TYPO3_DB'] - like $GLOBAL['MSSQL_DB']->exec_SELECTquery


I'm very much in doubt what will be the right way to do it.

Any qualified suggestions?


Regards
Peter Falk