Hi to all and good to be here!

I'm using Qt 4.2.3 on Windows XP and i'm trying to do a semi-transparent principal window drawing a simple line on it, changing the paintEvent of the Qwidget.
I don't want that line to be transparent. I used setWindowOpacity(0.0) but the line on it becames also tranparent.
How can i achieve my goal?

Any help would be appreciated.
Thanks,

nagpalma