exe文件运行窗口嵌入Qt窗口

 原理就是使用3个函数 FindWindow 、 QWindow::fromWinId 和 QWidget::createWindowContainer，具体实现如下：

#pragma once

#include <QtWidgets/QMainWindow>
#include <QProcess>
#include "ui_UE42Qt.h"


class UE42Qt : public QMainWindow
{
    Q_OBJECT

public:
    UE42Qt(QWidget *parent = Q_NULLPTR);

private:
    Ui::UE42QtClass *ui;

private:
    QProcess* process;

public:
    void StartUE4();
    void doInsideUE4(QString const& className, QString const& appName);
};

#include "UE42Qt.h"
#include <Windows.h>
#include <QWindow>


UE42Qt::UE42Qt(QWidget *parent)
    : QMainWindow(parent)
{
    ui->setupUi(this);
    StartUE4();
}

void UE42Qt::StartUE4()
{
    //启动UE4程序
    QString sPath = "./WindowsNoEditor/Che.exe";
    process = new QProcess;
    process->start(sPath);
    Sleep(3000);

    if (process->waitForStarted())