PrintScreen only active window

Question

I\'m writing a simple Windows Forms utility to screenshot either the entire screen or an active window and save the file. The winform has a button called \'Capture\' that, w

Answer 1

I ended up taking a different route.

I allow the user to resize my form window to cover exactly the area they need to screenshot, and then when they click the button, the form hides itself, takes a screenshot of the area it was covering and appears again. Contrary to my initial plan, I believe this will be more beneficial, as my targeted users (friends at an overclocking forum I'm part of) seldom take screenshots of just one window. They mostly need a couple of windows covered (temp monitoring, clockspeed monitoring, stability test etc.).

Thanks for all the answers guys. They definitely got me thinking, and made me realize what my options were.

Should anyone else need it, this is the code I use for the button that captures only part of the screen:

        try
        {
            this.Hide();
            Thread.Sleep(250);

            bmpScreenshot = new Bitmap(this.Bounds.Width, this.Bounds.Height, PixelFormat.Format32bppArgb);

            gfxScreenshot = Graphics.FromImage(bmpScreenshot);

            gfxScreenshot.CopyFromScreen(this.Bounds.X, this.Bounds.Y, 0, 0, this.Bounds.Size, CopyPixelOperation.SourceCopy);

            bmpScreenshot.Save(SaveLocation, ImageFormat.Png);

            tbxStatus.AppendText(Environment.NewLine);
            tbxStatus.AppendText(Environment.NewLine);
            tbxStatus.AppendText("Screenshot saved at " + SaveLocation);

            numSuffix++;
        }
        catch (Exception ex)
        {
            tbxStatus.AppendText(Environment.NewLine);
            tbxStatus.AppendText(Environment.NewLine);
            tbxStatus.AppendText("Unable to take screenshot. Exception: " + ex.ToString());
        }
        finally
        {
            this.Show();
        }