#include <QtGui/QApplication>#include <QtGui/QMainWindow>int main(int argc, char *argv[]){ QApplication a(argc, argv); QMainWindow w; QFlags<Qt::WindowType> resultFlag(w.windowFlags()); resultFlag &=~(Qt::WindowTitleHint|Qt::WindowSystemMenuHint|Qt::WindowMaximizeButtonHint|Qt::WindowMinimizeButtonHint|Qt::FramelessWindowHint); resultFlag |= Qt::CustomizeWindowHint; w.setWindowFlags(resultFlag); w.show(); return a.exec();}