I've written a code which receives images from a webcam by using OpenCV library. In this program, I try to recognize an object (for example an English letter). My application recognizes the letter. Suppose I've opened a word processor such as Notepad or MS Word, and it is running simultaneously with my mentioned Qt application. I'd like my Qt application to emulate keyboard. I mean, for example, when my application detects there is a "B" is in front of the webcam,it will emulate pressing "B" by keyboard, and for example if Notepad window is in focus, a "B" letter will be written in it. I also would like to be able to emulate pair keys, such as "Ctrl+A".

Is there any way to do this?