QT changes a form to a top-level form

// overloaded Resizeevent and moveevent two functions to ensure that the size and position of the form are changed to remember its position at all times Qrect curgemrect = mpwindow->geometry (); // activate the Mpwindow form as the top-level form for the desktop Qt::windowstates winstatus = qt::windownostate; if (Mpwindow->windowstate () & qt::windowmaximized) {    = qt::windowmaximized;} Mpwindow,setwindowstate (qt::windowminimized); Mpwindow->setwindowstate (qt::windowactive |  Winstatus), Mpwindow-setgeometry (curgemrect);Mpwindow Activatewindow(); Mpwindow ->raise ();

Qt changes a form to a top-level form