Assuming your keePass file has an appropriate file extension you should be
able to have it open automatically by customizing:
M-x customize-variable <ret> org-file-apps <ret>
and adding the file extension to the list of types (either with default or
by specifying exactly which application to use for the attachment.

Regards,

On Mon, Nov 14, 2011 at 16:08, Marc Croteau <mdcroteau@gmail.com> wrote:

> Hello,
>
> Hope someone can help.
> I have made a link to a file in my org file,
> Many links call the appropriate application (for example, a link to a
> '.odt' launches the oowriter application.
> For one specific file, a keePass file, Emac org simply tries to open its
> in fundamental mode (and it appears as a binary file).
> I am able to launch correctly the file from the dired.  Note, however,
> that I have added code to my init.el to use gnome to launch the file.
> My question:  can I somehow tell org-mode about how I want files of this
> type to be opened should I double-click them.
>
> Hope my question is clear enough.
>
> Thank you in advance.
> Marc Croteau
> Toronto
>
>
>