I found a sample project called 'MPEdit' that demonstrates how to embed an
IVsCodeWindow into a custom editor...but I need to make mine read-only.  I
want to display a read-only version of xml data using the code window.  The
implementation in the sample code window allows keyboard entry to modify the
code string but I want to disable all keypresses and stop modification of the
buffer.

Does anyone know how to do this?

Here's is the core of the sample, where the code window and text buffer is
created:

   public partial class CodeWindow : UserControl
   {
       private MPEditor _editor;
       private IVsCodeWindow _vsCodeWindow;
       private IntPtr _hWndCodeWindow = IntPtr.Zero;
       private uint cookie = 0;

       /*.....*/

       protected override void OnHandleCreated(EventArgs e)
       {
           base.OnHandleCreated(e);
           if (_editor != null)
               CreateVsCodeWindow();
       }

       private void CreateVsCodeWindow()
       {
           int hr = VSConstants.S_OK;
           Guid clsidVsCodeWindow = typeof(VsCodeWindowClass).GUID;
           Guid iidVsCodeWindow = typeof(IVsCodeWindow).GUID;
           Guid clsidVsTextBuffer = typeof(VsTextBufferClass).GUID;
           Guid iidVsTextLines = typeof(IVsTextLines).GUID;

           // create/site a VsTextBuffer object
           IVsTextBuffer vsTextBuffer =
(IVsTextBuffer)MPEdit.Instance.CreateInstance(ref clsidVsTextBuffer, ref
iidVsTextLines, typeof(IVsTextBuffer));
           IObjectWithSite ows = (IObjectWithSite)vsTextBuffer;
           ows.SetSite(_editor);
           string strXml = "<Xml><SubXml/></Xml>";
           hr = vsTextBuffer.InitializeContent(strXml, strXml.Length);
           hr = vsTextBuffer.SetLanguageServiceID(ref
GuidList.guidXmlLangSvc);

           // create/initialize/site a VsCodeWindow object
           _vsCodeWindow =
(IVsCodeWindow)MPEdit.Instance.CreateInstance(ref clsidVsCodeWindow, ref
iidVsCodeWindow, typeof(IVsCodeWindow));
           
           INITVIEW[] initView = new INITVIEW[1];
           initView[0].fSelectionMargin = 0;
           initView[0].fWidgetMargin = 0;
           initView[0].fVirtualSpace = 0;
           initView[0].fDragDropMove = 1;
           initView[0].fVirtualSpace = 0;
           IVsCodeWindowEx vsCodeWindowEx = (IVsCodeWindowEx)_vsCodeWindow;
           hr =
vsCodeWindowEx.Initialize((uint)_codewindowbehaviorflags.CWB_DISABLEDROPDOWNBAR | (uint)_codewindowbehaviorflags.CWB_DISABLESPLITTER,
               0, null, null,
               (uint)TextViewInitFlags.VIF_SET_WIDGET_MARGIN |
               (uint)TextViewInitFlags.VIF_SET_SELECTION_MARGIN |
               (uint)TextViewInitFlags.VIF_SET_VIRTUAL_SPACE |
               (uint)TextViewInitFlags.VIF_SET_DRAGDROPMOVE |
               (uint)TextViewInitFlags2.VIF_SUPPRESS_STATUS_BAR_UPDATE |
               (uint)TextViewInitFlags2.VIF_SUPPRESSBORDER |
               (uint)TextViewInitFlags2.VIF_SUPPRESSTRACKCHANGES |
               (uint)TextViewInitFlags2.VIF_SUPPRESSTRACKGOBACK,
               initView);

           hr = _vsCodeWindow.SetBuffer((IVsTextLines)vsTextBuffer);
           IVsWindowPane vsWindowPane = (IVsWindowPane)_vsCodeWindow;
           hr = vsWindowPane.SetSite(_editor);
           hr = vsWindowPane.CreatePaneWindow(this.Handle, 0, 0,
this.Parent.Size.Width, this.Parent.Size.Height, out _hWndCodeWindow);

           IVsTextView vsTextView;
           hr = _vsCodeWindow.GetPrimaryView(out vsTextView);

           // sink IVsTextViewEvents, so we can determine when a
VsCodeWindow object actually has the focus.
           IConnectionPointContainer connptCntr =
(IConnectionPointContainer)vsTextView;
           Guid riid = typeof(IVsTextViewEvents).GUID;
           IConnectionPoint cp;
           connptCntr.FindConnectionPoint(ref riid, out cp);
           cp.Advise(_editor, out cookie);
       }

       private void CodeWindow_SizeChanged(object sender, EventArgs e)
       {
           Win32.SetWindowPos(_hWndCodeWindow, IntPtr.Zero,
               0,0,
               this.Width,
               this.Height, 0);
       }

   }