hichuji,
You can't use BDE to directly open the file. BDE is an interface (API) for accessing the data, but it does not contain any client tools; that is, it doesn't contain an GUI for accessing the data through the API.
If you have professional (or better) versions of Delphi or C++ Builder, a GUI is provided in the form of the Database Desktop. These tools also contain an SQL Explorer that can be used to access and modify the tables.
As far as accessing the BDE with VB6, this is really a question better posted to the VB6 forum, however, I can tell you that you'll need to make sure you have a recent version of MDAC installed and you'll need to use the ODBC Administrator to create a ODBC DSN pointing to your Paradox tables.
However, this may not be possible if you really are using Paradox Level 7 tables. Unless something's changed in recent versions of MDAC, MS only provides support for Paradox 5 and older table formats. You would need to obtain a better ODBC Paradox driver than the one that MS provides. One is available, but it's more expensive than the upgrade to WPO 2002/Pro (which actually includes the ODBC driver).
Hope this helps...
-- Lance