This is a support app for the the Palm Messaging App.
Once installed, you lose some access to the normal inbox, which you may still want.
Using VJSlippyPalm, you can assign the app to a hardware key.
Running VJSlippyPalm will then launch the Palm Messaging app.
However, pressing it again will close Messaging and instead switch to the normal Inbox. And vice versa.
If you have one of the apps already launched in the background, it will jump to that app (eg if Inbox is open, and you're on the Today screen, it will jump to Inbox)
By default it will close the other app.
You can launch it with a command line -min to minimise instead, for whatever reasons.
-about will show information about the app.