OK, i see an example , i wanted to make as it :
Qt Code:
  1. formcharacter=new QWidget(this);
  2. liste = new QComboBox();
  3. QHBoxLayout *layout = new QHBoxLayout;
  4. layout->addWidget(liste);
  5. formcharacter->setLayout(layout);
  6. formcharacter->show();
To copy to clipboard, switch view to plain text mode 

but nothing changed