How is that ?!!

Part of Header files 's code generated to the form that contains the QStackedWidget :

Qt Code: 
  1. #include <QtGui/QStackedWidget>
  2. #include <QtGui/QWidget>
  3.  
  4.  
  5. class Ui_FormTwo
  6. {
  7. public:
  8.     QStackedWidget *stackedWidget;
  9.     QWidget *page;
  10.  
  11.     void setupUi(QWidget *FormTwo)
  12.     {
  13.     stackedWidget = new QStackedWidget(FormTwo);
  14.     stackedWidget->setObjectName(QString::fromUtf8("stackedWidget"));
  15.     stackedWidget->setGeometry(QRect(460, 130, 551, 371));
  16.     page = new QWidget();
  17.     page->setObjectName(QString::fromUtf8("page"));
  18.     page->setGeometry(QRect(0, 0, 551, 371));
  19.     stackedWidget->addWidget(page);
  20.  
  21.     retranslateUi(FormTwo);
  22.  
  23.     stackedWidget->setCurrentIndex(0);
  24.  
  25.  // ......................etc
  26.  
  27.     } // setupUi
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Temporarily , I've added the code that add my .UI to the stack at the constructor of the form that has the stack object :

Qt Code: 
  1. CustomSlot2::CustomSlot2(QWidget *parent): QWidget(parent)
  2. {
  3. 	formTwo.setupUi(this);
  4.  
  5. 	CustomSlot *CustomSlotObj=new CustomSlot()  ;
  6.  
  7. 	formTwo.stackedWidget->insertWidget(1,CustomSlotObj);
  8.  
  9.         QWidget *WidgetObj;
  10. 	WidgetObj= formTwo.stackedWidget->widget (1) ;
  11.  
  12.         WidgetObj->show();
  13.  
  14.  
  15. }
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Thanks .