C#

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 public class RichTextBoxPrintCtrl : RichTextBox<br />
    {<br />
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        //Convert the unit used by the .NET framework (1/100 inch) <br />
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        //and the unit used by Win32 API calls (twips 1/1440 inch)<br />
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        private const double anInch = 14.4;<br />
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        [StructLayout(LayoutKind.Sequential)]<br />
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        private struct RECT<br />
        {<br />
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            public int Left;<br />
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            public int Top;<br />
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            public int Right;<br />
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            public int Bottom;<br />
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        }<br />
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        [StructLayout(LayoutKind.Sequential)]<br />
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        private struct CHARRANGE<br />
        {<br />
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            public int cpMin; //First character of range (0 for start of doc)<br />
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            public int cpMax; //Last character of range (-1 for end of doc)<br />
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        }<br />
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        [StructLayout(LayoutKind.Sequential)]<br />
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        private struct FORMATRANGE<br />
        {<br />
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            public IntPtr hdc; //Actual DC to draw on<br />
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            public IntPtr hdcTarget; //Target DC for determining text formatting<br />
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            public RECT rc; //Region of the DC to draw to (in twips)<br />
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            public RECT rcPage; //Region of the whole DC (page size) (in twips)<br />
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            public CHARRANGE chrg; //Range of text to draw (see earlier declaration)<br />
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        }<br />
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        private const int WM_USER = 0x0400;<br />
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        private const int EM_FORMATRANGE = WM_USER + 57;<br />
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        [DllImport("USER32.dll")]<br />
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        private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp);<br />
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        // Render the contents of the RichTextBox for printing<br />
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        // Return the last character printed + 1 (printing start from this point for next page)<br />
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        public int Print(int charFrom, int charTo, Graphics gr, Rectangle bounds)<br />
        {<br />
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            //Calculate the area to render and print<br />
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            RECT rectToPrint;<br />
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            rectToPrint.Top = 0;// (int)(bounds.Top * anInch);<br />
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            rectToPrint.Bottom = (int)(bounds.Height * anInch);// (int)(bounds.Bottom * anInch);<br />
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            rectToPrint.Left = 0;// (int)(bounds.Left * anInch);<br />
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            rectToPrint.Right = (int)(bounds.Width * anInch);// (int)(bounds.Right * anInch);<br />
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            //Calculate the size of the page<br />
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            RECT rectPage;<br />
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            rectPage.Top = 0;//(int)(bounds.Top * anInch);<br />
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            rectPage.Bottom = (int)(gr.ClipBounds.Height * anInch);//(int)(bounds.Bottom * anInch);<br />
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            rectPage.Left = 0;//(int)(bounds.Left * anInch);<br />
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            rectPage.Right = (int)(gr.ClipBounds.Right * anInch);//(int)(bounds.Right * anInch);<br />
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            IntPtr hdc = gr.GetHdc();<br />
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            FORMATRANGE fmtRange;<br />
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            fmtRange.chrg.cpMax = charTo; //Indicate character from to character to <br />
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            fmtRange.chrg.cpMin = charFrom;<br />
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            fmtRange.hdc = hdc; //Use the same DC for measuring and rendering<br />
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            fmtRange.hdcTarget = hdc; //Point at printer hDC<br />
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            fmtRange.rc = rectToPrint; //Indicate the area on page to print<br />
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            fmtRange.rcPage = rectPage; //Indicate size of page<br />
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            IntPtr res = IntPtr.Zero;<br />
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            IntPtr wparam = IntPtr.Zero;<br />
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            wparam = new IntPtr(1);<br />
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            //Get the pointer to the FORMATRANGE structure in memory<br />
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            IntPtr lparam = IntPtr.Zero;<br />
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            lparam = Marshal.AllocCoTaskMem(Marshal.SizeOf(fmtRange));<br />
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            Marshal.StructureToPtr(fmtRange, lparam, false);<br />
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            //Send the rendered data for printing <br />
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            res = SendMessage(Handle, EM_FORMATRANGE, wparam, lparam);<br />
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            //Free the block of memory allocated<br />
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            Marshal.FreeCoTaskMem(lparam);<br />
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            //Release the device context handle obtained by a previous call<br />
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            gr.ReleaseHdc(hdc);<br />
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            //Return last + 1 character printer<br />
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            return res.ToInt32();<br />
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        }<br />
<br />
    }<br />
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WebClient imgClient = new WebClient();
String imgURL ="http://www.blah.com/image.jpg";

byte[] imageByteArray = imgClient.DownloadData(imgURL);
MemoryStream ms = new MemoryStream(imageByteArray);

System.Drawing.Image img = System.Drawing.Image.FromStream(ms);