C++:QX11EmbedContainer not working on Qt

Question

Given below is the code that I have written for opening VLC from Qt. I want to use the QX11EmbedContainer so that I can use it to "contain" VLC.

#include "mainwindow.h"
#include <QApplication>
#include <QProcess>
#include <QX11EmbedContainer>
using namespace std;

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QString prog="C:/Users/Administrator/Desktop/... .exe";
    QProcess *proc=new QProcess();
    proc->start(prog);
    return a.exec();
}

On adding the header file QX11EmbedContainer I get the following error:

C:\Users\Administrator\Documents\HA\main.cpp:4: error: C1083: Cannot open include file: 'QX11EmbedContainer': No such file or directory

Is QX11EmbedContainer an add-on? If not then where am I going wrong?