Joe handles since 1.40 version externals modules and a custom protocol which permits text exchanges. To be launched under Joe and appear in the pop-up modules (right click on text), these programs must : have the *.PRG extension be in a module directory defined in the options be besides a text file with the same name of the module but the *.JXM extension . Module activation is managed in Miscellaneous in Joe program. For more details, consult the programmer's guide