How to hide Close Button "X" on Widget ?

[arnaizf]

I did it a few minutes ago for my application. In main.cpp, write:

widget.setWindowFlags ( Qt::CustomizeWindowHint | Qt::WindowTitleHint);
widget.show();

Now you do not have close button, neither a menu close and ALT-F4 won't work.
Hope this can be helpful.

I'm using Qt4 under Linux