diff --git a/scons/winddk.py b/scons/winddk.py
new file mode 100644
index 0000000..be81d12
--- /dev/null
+++ b/scons/winddk.py
@@ -0,0 +1,114 @@
+"""winddk
+
+Tool-specific initialization for Microsoft Windows DDK.
+
+"""
+
+#
+# Copyright (c) 2001-2007 The SCons Foundation
+# Copyright (c) 2008 Tungsten Graphics, Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+import os.path
+import re
+import string
+
+import SCons.Action
+import SCons.Builder
+import SCons.Errors
+import SCons.Platform.win32
+import SCons.Tool
+import SCons.Util
+import SCons.Warnings
+
+import msvc_sa
+import mslib_sa
+import mslink_sa
+
+def get_winddk_paths(env, version=None):
+    """Return a 3-tuple of (INCLUDE, LIB, PATH) as the values
+    of those three environment variables that should be set
+    in order to execute the MSVC tools properly."""
+    
+    WINDDKdir = None
+    exe_paths = []
+    lib_paths = []
+    include_paths = []
+
+    if 'BASEDIR' in os.environ:
+        WINDDKdir = os.environ['BASEDIR']
+    else:
+        WINDDKdir = "C:\\WINDDK\\3790.1830"
+
+    exe_paths.append( os.path.join(WINDDKdir, 'bin') )
+    exe_paths.append( os.path.join(WINDDKdir, 'bin', 'x86') )
+    include_paths.append( os.path.join(WINDDKdir, 'inc', 'wxp') )
+    lib_paths.append( os.path.join(WINDDKdir, 'lib') )
+
+    target_os = 'wxp'
+    target_cpu = 'i386'
+    
+    env['SDK_INC_PATH'] = os.path.join(WINDDKdir, 'inc', target_os) 
+    env['CRT_INC_PATH'] = os.path.join(WINDDKdir, 'inc', 'crt') 
+    env['DDK_INC_PATH'] = os.path.join(WINDDKdir, 'inc', 'ddk', target_os) 
+    env['WDM_INC_PATH'] = os.path.join(WINDDKdir, 'inc', 'ddk', 'wdm', target_os) 
+
+    env['SDK_LIB_PATH'] = os.path.join(WINDDKdir, 'lib', target_os, target_cpu) 
+    env['CRT_LIB_PATH'] = os.path.join(WINDDKdir, 'lib', 'crt', target_cpu) 
+    env['DDK_LIB_PATH'] = os.path.join(WINDDKdir, 'lib', target_os, target_cpu)
+    env['WDM_LIB_PATH'] = os.path.join(WINDDKdir, 'lib', target_os, target_cpu)
+                                     
+    include_path = string.join( include_paths, os.pathsep )
+    lib_path = string.join(lib_paths, os.pathsep )
+    exe_path = string.join(exe_paths, os.pathsep )
+    return (include_path, lib_path, exe_path)
+
+def generate(env):
+
+    msvc_sa.generate(env)
+    mslib_sa.generate(env)
+    mslink_sa.generate(env)
+
+    if not env.has_key('ENV'):
+        env['ENV'] = {}
+    
+    try:
+        include_path, lib_path, exe_path = get_winddk_paths(env)
+
+        # since other tools can set these, we just make sure that the
+        # relevant stuff from WINDDK is in there somewhere.
+        env.PrependENVPath('INCLUDE', include_path)
+        env.PrependENVPath('LIB', lib_path)
+        env.PrependENVPath('PATH', exe_path)
+    except (SCons.Util.RegError, SCons.Errors.InternalError):
+        pass
+
+def exists(env):
+    if not msvc_sa.exits(env):
+        return 0
+    if not mslib_sa.exits(env):
+        return 0
+    if not mslink_sa.exits(env):
+        return 0
+    return 1
+
+# vim:set ts=4 sw=4 et: