QDialog is blank with show command - c++

Question

If I create my QDialog and show it modal with exec() everything works fine, but I need this no modal!
With show() the Dialog is empty!
ProgramLoading *programLoading = new ProgramLoading();
programLoading->show();
// some code
programLoading->done(0);
Constructor
ProgramLoading::ProgramLoading(QWidget *parent)
: QDialog(parent)
{
ui.setupUi(this);
setWindowFlags( Qt::CustomizeWindowHint ); // remove window border
}
Don't think something with Dialog code is wrong because it works with exec()!
Any hints? Thank you!
PS: I'm using QT plugin for VisualStudio 2008

Answer 1

mw (Default with Window Decoration):
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
sd = new SplashDialog();
sd->show();
QTimer::singleShot(10000,this,SLOT(closeSplashDialog()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::closeSplashDialog()
{
sd->close();
delete sd;
}
splash (UI having Label and Button):
SplashDialog::SplashDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::SplashDialog)
{
ui->setupUi(this);
setWindowFlags( Qt::CustomizeWindowHint );
}
SplashDialog::~SplashDialog()
{
delete ui;
}
Splash Dialog opens and is being closed 10 seconds later as intended