Make object key working without being the main program MAX MSP

Hello maxers, I've solved in the past but I don't remember. I would like to stay in other programs, but want the Max running in second window. For example if I map the keyboard with key object and I make clic on a screen of jit.window, it doesn't work. Also, if I'm writing in a TExtedit... it doesn't work. Let's imagine I would like to count how many spaces are in a writting text with Key object in Max, however if I'm on Texedit, it don't report anything...

What do you recommend?

Best wishes