以下达到了预期的结果,关键是添加了FramelessWindowHint:
QWindow *window = QWindow::fromWinId(211812356);
window->setFlags(Qt::FramelessWindowHint);
QWidget *widget = QWidget::createWindowContainer(window);
QV@R_461_2419@Layout *layout = new QV@R_461_2419@Layout(this);
layout->addWidget(widget);
this->setLayout(layout);