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diff --git a/Source/cmDocumentationFormatter.h b/Source/cmDocumentationFormatter.h
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+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even 
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#ifndef _cmDocumentationFormatter_h
+#define _cmDocumentationFormatter_h
+
+#include "cmStandardIncludes.h"
+
+/** This is just a helper class to make it build with MSVC 6.0.
+Actually the enums and internal classes could directly go into
+cmDocumentation, but then MSVC6 complains in RequestedHelpItem that 
+cmDocumentation is an undefined type and so it doesn't know the enums.
+Moving the enums to a class which is then already completely parsed helps
+against this. */
+class cmDocumentationEnums
+{
+public:
+  /** Types of help provided.  */
+  enum Type 
+     { None, Usage, Single, SingleModule, SingleProperty,
+       List, ModuleList, PropertyList,
+       Full, Properties, Modules, Commands, CompatCommands,
+       Copyright, Version };
+
+  /** Forms of documentation output.  */
+  enum Form { TextForm, HTMLForm, ManForm, UsageForm };
+};
+
+/** Base class for printing the documentation in the various supported 
+   formats. */
+class cmDocumentationFormatter
+{
+public:
+  cmDocumentationFormatter();
+  virtual ~cmDocumentationFormatter();
+  void PrintFormatted(std::ostream& os, const char* text);
+
+  virtual cmDocumentationEnums::Form GetForm() const = 0;
+  
+  virtual void PrintHeader(const char* name, std::ostream& os) {}
+  virtual void PrintFooter(std::ostream& os) {}
+  virtual void PrintSection(std::ostream& os,
+                    const cmDocumentationEntry* section,
+                    const char* name) = 0;
+  virtual void PrintPreformatted(std::ostream& os, const char* text) = 0;
+  virtual void PrintParagraph(std::ostream& os, const char* text) = 0;
+};
+
+#endif