Change Data Base of Crystal Report 7.0

See!!! my problem is something like this.......
I'm working on two different database with same field names... I want to work on both of these database; how can I change database of crystal report X to database Y through selection of COMBO BOX.
I am Developing system in VB6.0 , Crystal Report 7.0 with SQL Server Database.

You need to change the location of your tables.

See page six of this pdf for examples: http://support.crystaldecisions.com/...8-ocxtordc.pdf most of the information is valid for crystal 7.0.