How to hide mainwindow at program start up

[palmer]

I want my program run without displaying GUI or Console, i tried like this:
In the constructor of MainWindow( inherited from QMainWindow), call the member function setVisible(false) or hide(), but that did not work.
how to hide mainwindow at program start up?
thks!

[santhoshv84]

Hi,

Use the main() function like this..

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	Test w;
	w.show();
	w.hide();
	a.connect(&a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()));
	return a.exec();
}

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	Test w;
	w.show();
	w.hide();
	a.connect(&a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()));
	return a.exec();
}

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Thanks and regards,
Santhosh

[jpn]

What's the point of calling show() and hide() in a row? Just don't call show() in the first place.

[palmer]

thanks for all of you.
What i want to do is that: In an application, i use QProcess to start the program and send messages to it using WIN32 API SendMessage, and this API function needs Windows handle as parameter, So the program must has 'window'.
I will try the solutions you provided.
thank you and best regard!

[jpn]

So create a QWidget and use winId() to get the handle. QWidget is not visible by default. If you don't want to show it, don't call show().