How to make/add obscure key code?

[mikekornikh]

Hi! I'm using a UST home theater projector that's running some old version of Android and KeyMapper works perfectly on it. All the buttons on the remote are easily re-mapped. The only issue I have is that this projector uses a weird key for the input command. (To open the source select menu) When I use the "Record Trigger" button and press the input button on my projector's remote, the trigger is named "TV Input". I want to set an action that involves pressing that "TV Input" button, but all the keycodes I tried (including all the key-codes with specific inputs) in the actions didn't work. Is there a way for me to either record the same button for the action or somehow find its correct keycode?