I want to write my own keylogger using Java. To write the keylogger i would need a hook file that will catch the keyevents by the users. How can i write this hook file so that i am able to get the keys user presses. I am unaware how to write a global key listener in C.
writing a key listener in c
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What you are trying to do will not be platform independent. As such, I can only give you a hint on how to do it on windows.
In windows, the way to do this is by using the winapi. You can use the SetWindowsHookEx function with the
WH_KEYBOARD
argument which:This way, you will basically tell windows to call your predefined function (sent as argument to SetWindowsHookEx) every time a key is pressed. You can read about specifics on the webpage I gave you.
Since the SetWindowsHookEx function is windows specific, note that you cannot use this on linux or any other os. Also, for a basic program to do what you want, you don't really need Java. You can pretty much do everything in C/C++.