You can use the post backup script config in the subclient, combined with a backup script saved using the "Save as script" feature. If you go to the Windows server where you have the file share (I'm assuming its in its own subclient) and using the "Save as script" option save the script to the Linux client where you run the oracle backup. Then call that script from the Oracle client in the post backup script. You will need to "tweak" the script and supply the full path to the "XML" file that gets generated with the script. (by default the script is created assuming that it will be executed from the same directory where the xml file is located, but pre/post scripts are executed from the CV install path.)
This way as soon as the oracle backup completes it will trigger the windows file share backup.
Also... I would recommend to use the "asyncronous" option in save as script so that the oracle backup completes as soon as it triggers the windows backup job and doesn't wait for that backup to complete. :)
Ernst F. Graeler
Senior Engineer III