Help with multiple forms...!

[hakermania]

Ok, let's see....

void MainWindow::on_pushButton_clicked()
{
    QDialog *dial = new QDialog;
    dial->setWindowTitle("Hello world");
    dial->show();
}

void MainWindow::on_pushButton_clicked()
{
    QDialog *dial = new QDialog;
    dial->setWindowTitle("Hello world");
    dial->show();
}

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How can I edit this QDialog? Add buttons, labels, etc..?