Sending keypresses to a specific window / app (ie: Discord)

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Hi, 

Just wondering if it's possible to send keypresses to a specific window for example: Discord. I want to be able to send CTRL+SHIFT+D so I can deafen my discord when needed. I've seen other apps that can do it (voiceattack) and it does not lose focus from the game.

[Zeanon 22]

Discord Hotkeys should also be global and not remove focus from the game.
I eg. use Pause/Break as dc full mute and it works everywhere.

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For whatever reason the discord key bindings where not working in-game (Escape From Tarkov). Nevertheless, your suggest was right on the money and it works like a charm! 

Honestly, I have never seen anyone like you on any forum. You are quick, efficient, and extremely knowledgeable.

THANK YOU!