new_contents: # Copyright 2015 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  """Dumps a Windows shortcut's property bag to stdout.
  
  This is required to confirm correctness of properties that aren't readily
  available in Windows UI.
  """
  
  import optparse
  from pywintypes import IID
  import sys
  from win32com.propsys import propsys
  from win32com.propsys import pscon
  
  
  def PrintShortcutProperties(shortcut_path, dump_all):
    properties = propsys.SHGetPropertyStoreFromParsingName(shortcut_path)
  
    print 'Known properties (--dump-all for more):'
  
    app_id = properties.GetValue(pscon.PKEY_AppUserModel_ID).GetValue()
    print '\tAppUserModelId => "%s"' % app_id
  
    # Hard code PKEY_AppUserModel_IsDualMode as pscon doesn't support it.
    PKEY_AppUserModel_IsDualMode = (IID('{9F4C2855-9F79-4B39-A8D0-E1D42DE1D5F3}'),
                                    11)
    dual_mode = properties.GetValue(PKEY_AppUserModel_IsDualMode).GetValue()
    print '\tDual Mode => "%s"' % dual_mode
  
    # Dump all other properties with their raw ID if requested, add them above
    # over time as we explicitly care about more properties, see propkey.h or
    # pscon.py for a reference of existing PKEYs' meaning.
    if dump_all:
      print '\nOther properties:'
      for i in range(0, properties.GetCount()):
        property_key = properties.GetAt(i)
        property_value = properties.GetValue(property_key).GetValue()
        print '\t%s => "%s"' % (property_key, property_value)
  
  
  def main():
    usage = 'usage: %prog [options] "C:\\Path\\To\\My Shortcut.lnk"'
    parser = optparse.OptionParser(usage,
                                   description="Dumps a shortcut's  properties.")
    parser.add_option('-a', '--dump-all', action='store_true', dest='dump_all',
                      default=False)
    options, args = parser.parse_args()
  
    if len(args) != 1:
      parser.error('incorrect number of arguments')
  
    PrintShortcutProperties(args[0], options.dump_all)
  
  
  if __name__ == '__main__':
    sys.exit(main())
  
subject: Add a script to installer/tools to dump a shortcut's property bag.