appQSharedMemory shared(appID); //attach成功表示已经存在该内存了表示当前存在实例 if (shared.attach())//共享内存被占用则直接返回 return 0; MainWindow w; w.show(); qulonglong winID (qulonglong)w.winId(); shared.create(32); shared.lock(); memcpy(shared.data(), winID, sizeof(qlonglong)); shared.unlock();process// 启动窗口 QProcess process; process.start(app.exe); process.waitForStarted(); QSharedMemory shareMem(appID); if(!shareMem.isAttached()) shareMem.attach(); HWND winID; shareMem.lock(); memcpy(winID, shareMem.data(), sizeof (qulonglong)); shareMem.unlock(); shareMem.detach(); qDebug() id: winID \n; // 嵌入进程窗口显示 auto window QWindow::fromWinId((WId)winID); auto widget QWidget::createWindowContainer(window, nullptr); widget-show();效果注调试崩溃会引起共享内存异常需taskkill /f /im app.exe|process.exe创作不易小小的支持一下吧