anchor.diff:  
   :FAIL0
   ECHO:
  -ECHO: [VCbind] **** COMMAND SHELL EXTENSIONS REQUIRED ****
  -ECHO:          This script requires CMDEXTVERSION 2 or greater.
  -ECHO:          This is available since at least Windows XP SP3.
  +ECHO:          **** COMMAND SHELL EXTENSIONS REQUIRED ****
  +ECHO:          VCbind requires CMDEXTVERSION 2 or greater.
  +ECHO:          This is available on all platforms VCbind supports.
   ECHO: 
   ECHO:          NO CHANGES HAVE BEEN MADE
   ECHO:          To enable Command Extensions, arrange to initiate
  
positive.code: rem CHECK WHETHER THERE HAS BEEN SOME OTHER BINDING ALREADY 
  IF DEFINED VisualStudioVersion GOTO :FAIL4
  
  rem FIND AVAILABLE 
  rem 
  rem    XXX: Just use known version 11.0 for initial testing.
  set VCasked=110
  CALL "%VS110COMNTOOLS%..\..\VC\vcvarsall.bat" %1
  rem Only call if there has never been a successful operation
  IF "%VisualStudioVersion%" == "" GOTO :FAIL5
  
  ECHO:
  ECHO: [VCbind] Environment set for VC++ %VisualStudioVersion% %VCmodeAsked%.
  GOTO :SUCCESS
  
  :ALREADY
  
negative.code: 
  :FAIL5
  ECHO:
  ECHO: [VCbind] *** SETUP FOR TOOLS %VCasked% %VCmodeAsked%-MODE FAILED ***
  ECHO:          Check preceding messages for failure information.
  ECHO:
  ECHO:          THE CURRENT STATE IS UNPREDICTABLE
  ECHO:          It is likely that %VCmodeAsked%-mode is not supported by
  ECHO:          the installed VS %VCasked% Common Tools.  There may
  ECHO:          be other problems.
  GOTO :BAIL
  