To Connect to an Oracle Database from the Product Properties Dialog

Right-click the product icon and from the menu that appears, choose Properties.
In the Properties dialog, select the Shortcut tab.
At the end of the Target field, key in -wdoracle.
The Target field should now look something like this, depending on where you installed your product:

C:\Program Files\Bentley\MicroStation\MicroStation CONNECT Edition\microstation.exe -wdoracle
Click Apply to save the changes and close the dialog.
Start MicroStation by double-clicking its icon.
In the Key-in window, key in DB =<user_name>/<password>@<database_alias>.
Note: Starting MicroStation with the -wdoracle switch automatically loads the configuration variables.

The Oracle client files delivered with MicroStation are for use with Oracle 9i, 10g, and 11g.

Note: If you have multiple Oracle clients installed on your system, ensure that the correct Oracle client files are used to connect to Oracle by setting the configuration variable MS_ORACLE_HOME in the oracle.cfg file located in the ..\config\database\ folder in MicroStation's program directory.