Notes about the $DX file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The $DX file type is primarily associated with 'Ca Visual Objects Platform for Developer (CAVO)' by CA. CA is the new name for Computer Associates. Visual Objects simplifies the integration of Windows and browser clients, web servers, middleware and back-end database systems. The .APP file usually has an associated .IDX index file and perhaps a .$DX backup index file. A *.CDP may also be present.