It sounds like you need to write something to monitor the CM19A for a specific command, then have it run a script of some sort to send the keystroke to your program. Since you are "not a programmer" (neither am I, by the way), you might want something a bit easier than writing it yourself.
If you have the SmartMacros plugin, you can try to create a macro triggered by the button press, that then runs a script created using AutoIt or AutoHotKey to simulate the keyboard press.
Those applications can (usually) direct the keypress at a specific application window.