Adding Separate Widgets into Layout

[ashboi]

I've created 3 separate widgets(3different classes), I would like to add them into my QMainwindow in the 3 frames that I've created using the Qt designer. I cant seem to get it to work here is my main file hopefully someone could tell me whats wrong with it.

the 3 different classes are secret, decode & pick.

Thank you

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QMainWindow *MyAppWindow = new QMainWindow;
	Ui::MainWindow mainwindow;
	mainwindow.setupUi(MyAppWindow);
 
	mainwindow.secretFrame->secret(QWidget *parent);
	mainwindow.boardFrame->decode(QWidget *parent);
	mainwindow.pickerFrame->pick(QWidget *parent);
 
	MyAppWindow->show();
	return app.exec();
}

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	QMainWindow *MyAppWindow = new QMainWindow;
	Ui::MainWindow mainwindow;
	mainwindow.setupUi(MyAppWindow);

	mainwindow.secretFrame->secret(QWidget *parent);
	mainwindow.boardFrame->decode(QWidget *parent);
	mainwindow.pickerFrame->pick(QWidget *parent);

	MyAppWindow->show();
	return app.exec();
}

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