QDialog* pDlg = new QDialog(this);
pDlg->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);

    QLabel* pLabel = new QLabel;
    QLineEdit* pLineEdit = new QLineEdit;
    
    QHBoxLayout* pHBL1 = new QHBoxLayout();
    pHBL1->addWidget(pLabel);
    pHBL1->addWidget(pLineEdit);

    QPushButton* pButtonCreate = new QPushButton();
    pButtonCreate->setText(tr("1"));
    QPushButton* pButtonExit = new QPushButton();
    pButtonExit->setText(tr("2"));

    QHBoxLayout* pHBL2 = new QHBoxLayout();
    pHBL2->addWidget(pButtonCreate);
    pHBL2->addWidget(pButtonExit);

    QVBoxLayout* pVBL = new QVBoxLayout();
    pVBL->addLayout(pHBL1);
    pVBL->addLayout(pHBL2);

    pDlg->setLayout(pVBL);
    pDlg->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed);