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diff --git a/Source/cmFunctionCommand.h b/Source/cmFunctionCommand.h
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+++ b/Source/cmFunctionCommand.h
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+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmFunctionCommand_h
+#define cmFunctionCommand_h
+
+#include "cmCommand.h"
+#include "cmFunctionBlocker.h"
+
+class cmFunctionFunctionBlocker : public cmFunctionBlocker
+{
+public:
+  cmFunctionFunctionBlocker() {this->Depth=0;}
+  virtual ~cmFunctionFunctionBlocker() {}
+  virtual bool IsFunctionBlocked(const cmListFileFunction&, 
+                                 cmMakefile &mf,
+                                 cmExecutionStatus &);
+  virtual bool ShouldRemove(const cmListFileFunction&, cmMakefile &mf);
+  
+  std::vector<std::string> Args;
+  std::vector<cmListFileFunction> Functions;
+  int Depth;
+};
+
+/// Starts function() ... endfunction() block
+class cmFunctionCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone()
+    {
+    return new cmFunctionCommand;
+    }
+
+  /**
+   * This is called when the command is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool InitialPass(std::vector<std::string> const& args,
+                           cmExecutionStatus &status);
+
+  /**
+   * This determines if the command is invoked when in script mode.
+   */
+  virtual bool IsScriptable() const { return true; }
+
+  /**
+   * The name of the command as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() const { return "function";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Start recording a function for later invocation as a command.";
+    }
+
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "  function(<name> [arg1 [arg2 [arg3 ...]]])\n"
+      "    COMMAND1(ARGS ...)\n"
+      "    COMMAND2(ARGS ...)\n"
+      "    ...\n"
+      "  endfunction(<name>)\n"
+      "Define a function named <name> that takes arguments named "
+      "arg1 arg2 arg3 (...).  Commands listed after function, but before "
+      "the matching endfunction, are not invoked until the function "
+      "is invoked.  When it is invoked, the commands recorded in the "
+      "function are first modified by replacing formal parameters (${arg1}) "
+      "with the arguments passed, and then invoked as normal commands. In "
+      "addition to referencing the formal parameters you can reference "
+      "the variable ARGC which will be set to the number of arguments "
+      "passed into the function as well as ARGV0 ARGV1 ARGV2 ... which "
+      "will have the actual values of the arguments passed in. This "
+      "facilitates creating functions with optional arguments. Additionally "
+      "ARGV holds the list of all arguments given to the function and ARGN "
+      "holds the list of argument past the last expected argument."
+      "\n"
+      "See the cmake_policy() command documentation for the behavior of "
+      "policies inside functions."
+      ;
+    }
+
+  cmTypeMacro(cmFunctionCommand, cmCommand);
+};
+
+
+#endif