Delete QDialogs default close button

Question

I know, that's not a new question, but I didn't found the answer. I need a dialog with title, but without close button. And it should work on Linux with Qt 4.8.

I try to do it as here: Disable QDialogs default close button (upper left “cross button”)? But it doesn't work for me. The title is with close button or there is no title at all.

The results from Window Flags Example:

Answer 1

Try using the Qt::Window default flags:

    setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::CustomizeWindowHint);