diff --git a/rfb/CMsgWriter.h b/rfb/CMsgWriter.h
new file mode 100644
index 0000000..8d6e373
--- /dev/null
+++ b/rfb/CMsgWriter.h
@@ -0,0 +1,64 @@
+/* Copyright (C) 2002-2003 RealVNC Ltd.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CMsgWriter - class for writing RFB messages on the server side.
+//
+
+#ifndef __RFB_CMSGWRITER_H__
+#define __RFB_CMSGWRITER_H__
+
+#include <rdr/types.h>
+
+namespace rdr { class OutStream; }
+
+namespace rfb {
+
+  class PixelFormat;
+  class ConnParams;
+  struct Rect;
+
+  class CMsgWriter {
+  public:
+    virtual ~CMsgWriter();
+
+    virtual void writeClientInit(bool shared)=0;
+
+    virtual void writeSetPixelFormat(const PixelFormat& pf);
+    virtual void writeSetEncodings(int nEncodings, rdr::U32* encodings);
+    virtual void writeSetEncodings(int preferredEncoding, bool useCopyRect);
+    virtual void writeFramebufferUpdateRequest(const Rect& r,bool incremental);
+    virtual void writeKeyEvent(rdr::U32 key, bool down);
+    virtual void writePointerEvent(int x, int y, int buttonMask);
+    virtual void writeClientCutText(const char* str, int len);
+
+    virtual void startMsg(int type)=0;
+    virtual void endMsg()=0;
+
+    virtual void setOutStream(rdr::OutStream* os);
+
+    ConnParams* getConnParams() { return cp; }
+    rdr::OutStream* getOutStream() { return os; }
+
+  protected:
+    CMsgWriter(ConnParams* cp, rdr::OutStream* os);
+
+    ConnParams* cp;
+    rdr::OutStream* os;
+  };
+}
+#endif