Can I directly draw my screen

Hi,
I post threads times in the forum one day and all my problems are got solved by
ur help.
thanks. :p

Quote:

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Can I direct draw my screen

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On windows,I can pass a NULL pointer to GetDC api to get the
screen device context and operate on it.

Is there any way I can do this in QT?
I try QApplication::desktop()->screen(),but It seems that all paintdevice can only
be drew with QPainter in paintEvent.

So I faild the code:

Code:

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QPainter  pd(QApplication::desktop()->screen());
	pd.drawLine(0,0,500,500);

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any suggestion please?

Thanks.

You can't draw directly on the desktop using Qt. Either use native system calls (which is not recommended anyway) or create a transparent widget (use QWidget::setMask) on your desktop and draw on it.