QT background process for keyboard input sniffing

am working on a simple application which would run in the background and capture keyboard input from the user (like a keylogger , but for the LAN )

I am sending UDP packets for transferring keystrokes But the problem of capt开发者_运维问答uring keyboard input from a background process still seems unreachable . So help needed .

If you want to do it for Windows you will have to use the WinAPI : SetWindowsHookEx. I don't know for Linux or MacOS

Edit :

Here is the documentation : SetWindowsHookEx
Wih an exemple here.