Autohotkey simple script question

[Teletha]

Is it possible to make autohotkey send a key press "L" to a application in the background while I'am in fullscreen in a game without it affecting the game in focus? 

[C2dan88]

no, the window needs to have focus to receive key presses.

[LogicalDrm]

https://www.autohotkey.com/docs/commands/ControlSend.htm

This apparently should do it. But do consider that you may need to add other commands to remove your active window from receiving same press. What are you trying to achieve with this?

[minibois]

You probably need "ControlSend": https://www.autohotkey.com/docs/commands/ControlSend.htm

I can open a new window and press a letter, but I can't figure out how to make it press a letter inside an already existing window.

 

F23::
	Run, Notepad,, Min, PID
	WinWait, ahk_pid %PID%
	ControlSend,, L

For example, this opens a new Notepad window in the background and press the letter L. The issue is that it keeps opening new windows, but maybe you can figure out how to make it detect an existing window. 

 

Keep in mind particularly games apparently don't like Autohotkey, so use at your own risk.