Windows hook using windows api in QT

[davinciomare]

Hi i am searching for windows hook and i checked this in the webpage of microsoft. But i dont know how i can't return the value since function using LRESULT to show for example since qDebug the key pressed for me in terminal.
Error:
C:\Users\moh\Documents\Hook\main.cpp:63: error: C2440: 'return' : no se puede realizar la conversi¢n de 'QString' a 'LRESULT' No hay disponible ning£n operador de conversi¢n definido por el usuario que pueda realizar esta conversi¢n, o bien no se puede llamar al operador

The question is how i can change the returned value to Qstring. It's only for doing one example with qDebug thx