@A-Trujillo si tu problema está solucionado, por favor no te olvides de marcar tu pregunta como tal. Muchas gracias.
No invalid devices nor problems are reported in the device manager.
Even if it is ugly (as I loved the Welcome page) and really weird... It seems to work, I will try in more details later ^^.
Thanks for the info.
Well i have tried to port the programm to use regular QMainWindows.
But then i have issues to handle the maximum, minimum controls and to constrain the maximized window to my own mdiarea.
Hi and welcome to devnet,
Qt has no control over Desktop Manager ; IMO you should have a look to the Windows native API.