Open a PowerPoint inside QMainWindow

[blackout69]

Hi,
with this code I can open PowerPoint files (.ppt or .pptx)

FullScreen::FullScreen(QWidget *parent) :
   QMainWindow(parent),
   ui(new Ui::FullScreen)
{
   ui->setupUi(this);
 
   QString file_ppt = "C:\\aaa.pptx";
 
   // Open parameter
   QList<QVariant> param_list;
   param_list.append(file_ppt);
   param_list.append(1);
   param_list.append(0);
   param_list.append(0);
 
   // Make a object PPT
   QAxWidget *obj_ppt = new QAxWidget("Powerpoint.Application", this->ui->slides);
   obj_ppt->setGeometry(QRect(0,0,800,600));
 
   if(!obj_ppt->setControl("{91493441-5A91-11CF-8700-00AA0060263B}"))
      {
         QMessageBox::critical(this, trUtf8("Error PPT"), "Install Microsoft Power Point (R) for the support PPT!");
      }
 
   // Open a template file
   QAxObject *presentations = obj_ppt->querySubObject("Presentations");
   QAxObject *presentation = presentations->querySubObject("Open(const QString&,int,int,int)", param_list);
 
   // Start the slides
   QAxObject *slideshow = presentation->querySubObject("SlideShowSettings");
   slideshow->setProperty("RangeType", "ppShowAll");
   slideshow->dynamicCall("run()");
}

FullScreen::FullScreen(QWidget *parent) :
   QMainWindow(parent),
   ui(new Ui::FullScreen)
{
   ui->setupUi(this);

   QString file_ppt = "C:\\aaa.pptx";

   // Open parameter
   QList<QVariant> param_list;
   param_list.append(file_ppt);
   param_list.append(1);
   param_list.append(0);
   param_list.append(0);

   // Make a object PPT
   QAxWidget *obj_ppt = new QAxWidget("Powerpoint.Application", this->ui->slides);
   obj_ppt->setGeometry(QRect(0,0,800,600));

   if(!obj_ppt->setControl("{91493441-5A91-11CF-8700-00AA0060263B}"))
      {
         QMessageBox::critical(this, trUtf8("Error PPT"), "Install Microsoft Power Point (R) for the support PPT!");
      }

   // Open a template file
   QAxObject *presentations = obj_ppt->querySubObject("Presentations");
   QAxObject *presentation = presentations->querySubObject("Open(const QString&,int,int,int)", param_list);

   // Start the slides
   QAxObject *slideshow = presentation->querySubObject("SlideShowSettings");
   slideshow->setProperty("RangeType", "ppShowAll");
   slideshow->dynamicCall("run()");
}

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What I want to obtain, is to show the slide into object QAxWidget called ui->slides centered in my form.
Instead I get to open the my form with a black rectangle of 800x600 pixels and a full screen slide out of the my form.
Someone can help me understand where I'm wrong?
Thanks.
blackout69