[RESOLVED]Screenshot, without screen?

[Mindstorms]

Hello,

I have a pc, without a monitor attached to it. I want to make a screenshot once in x minutes, and then upload the image. The problem is, I cannot make a screenshot, because there is no screen?

I tried this code:

        public Image CaptureScreen()
        {
            System.Windows.Forms.SendKeys.SendWait("{PRTSC}");
            return System.Windows.Forms.Clipboard.GetImage();
        }

I don't get anything this way.

I also tried this (Also with hardcoded values, 800*600), and don't get anything.

        public Image CaptureScreen()
        {
            Bitmap bmpScreenshot;
            Graphics gfxScreenshot;

            // Set the bitmap object to the size of the screen
            bmpScreenshot = new Bitmap(System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
            // Create a graphics object from the bitmap
            gfxScreenshot = Graphics.FromImage(bmpScreenshot);
            // Take the screenshot from the upper left corner to the right bottom corner
            gfxScreenshot.CopyFromScreen(System.Windows.Forms.Screen.PrimaryScreen.Bounds.X, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Y, 0, 0, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy);
            return bmpScreenshot;
        }

And this (Which gives me a black 800*600 file)

        public Image CaptureScreen()
        {
            return CaptureWindow(User32.GetDesktopWindow());
        }
        public Image CaptureWindow(IntPtr handle)
        {
            // get te hDC of the target window
            IntPtr hdcSrc = User32.GetWindowDC(handle);
            // get the size
            User32.RECT windowRect = new User32.RECT();
            User32.GetWindowRect(handle, ref windowRect);
            int width = windowRect.right - windowRect.left;
            int height = windowRect.bottom - windowRect.top;
            // create a device context we can copy to
            IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
            // create a bitmap we can copy it to,
            // using GetDeviceCaps to get the width/height
            IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
            // select the bitmap object
            IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
            // bitblt over
            GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
            // restore selection
            GDI32.SelectObject(hdcDest, hOld);
            // clean up
            GDI32.DeleteDC(hdcDest);
            User32.ReleaseDC(handle, hdcSrc);
            // get a .NET image object for it
            Image img = Image.FromHbitmap(hBitmap);
            // free up the Bitmap object
            GDI32.DeleteObject(hBitmap);
            return img;
        }
        private class User32
        {
            [StructLayout(LayoutKind.Sequential)]
            public struct RECT
            {
                public int left;
                public int top;
                public int right;
                public int bottom;
            }
            [DllImport("user32.dll")]
            public static extern IntPtr GetDesktopWindow();
        }

Is there any other way to make a screenshot? Is there even a way to do it without having a screen?

With kind regards,
Thomas