Perform screen-scape of Webbrowser control in thread

Question

I am using the technique shown in

WebBrowser Control in a new thread

Trying to get a screen-scrape of a webpage I have been abl

Answer 1

using (Graphics graphics = Graphics.FromImage(image))
    {
        Point p = new Point(0, 0);
        Point upperLeftSource = browser.PointToScreen(p);
        Point upperLeftDestination = new Point(0, 0);

        Size blockRegionSize = browser.ClientRectangle.Size;
        blockRegionSize.Width = blockRegionSize.Width - 15;
        blockRegionSize.Height = blockRegionSize.Height - 15;
        graphics.CopyFromScreen(upperLeftSource, upperLeftDestination, blockRegionSize);
    }

Do you really need using statement ?

You also return image but how is copied image assigned to it?