title: Trying to build the basic python extension example fails (windows)
body: <p>I have Python 2.6 and Visual Studio 2008 running on a Win7 x64 machine.
  When I try to build the basic python extension example in c "example_nt" as found in the python 2.6 sources distribution, it  fails:</p>
  
  <pre><code>python setup.py build
  </code></pre>
  
  <p>And this results in:</p>
  
  <pre><code>running build
  running build_ext
  building 'aspell' extension
  Traceback (most recent call last):
    File "setup.py", line 7, in &lt;module&gt;
      ext_modules = [module1])
    File "C:\Python26\lib\distutils\core.py", line 152, in setup
      dist.run_commands()
    File "C:\Python26\lib\distutils\dist.py", line 975, in run_commands
      self.run_command(cmd)
    File "C:\Python26\lib\distutils\dist.py", line 995, in run_command
      cmd_obj.run()
    File "C:\Python26\lib\distutils\command\build.py", line 134, in run
      self.run_command(cmd_name)
    File "C:\Python26\lib\distutils\cmd.py", line 333, in run_command
      self.distribution.run_command(command)
    File "C:\Python26\lib\distutils\dist.py", line 995, in run_command
      cmd_obj.run()
    File "C:\Python26\lib\distutils\command\build_ext.py", line 343, in run
      self.build_extensions()
    File "C:\Python26\lib\distutils\command\build_ext.py", line 469, in build_extensions
  self.build_extension(ext)
    File "C:\Python26\lib\distutils\command\build_ext.py", line 534, in build_extension
  depends=ext.depends)
    File "C:\Python26\lib\distutils\msvc9compiler.py", line 448, in compile
  self.initialize()
    File "C:\Python26\lib\distutils\msvc9compiler.py", line 358, in initialize
      vc_env = query_vcvarsall(VERSION, plat_spec)
    File "C:\Python26\lib\distutils\msvc9compiler.py", line 274, in query_vcvarsall
  raise ValueError(str(list(result.keys())))
  ValueError: [u'path']
  </code></pre>
  
  <p>What can I do to fix this? Any help will be appreciated</p>