anchor.diff:  set BOOST_ROOT=C:/local/boost_1_59_0
   rem #######################################################
   
  -if not defined VS140COMNTOOLS goto :NoVS
  +if not defined VS150COMNTOOLS goto :NoVS
   if [%1]==[] goto :Usage
   if [%1]==[32] goto :32
   if [%1]==[64] goto :64
  
positive.code: :32
  set NANOP=32
  set MSBUILDP=Win32
  set GENERATOR="Visual Studio 14 2015"
  goto :Build
  
  :64
  set NANOP=64
  set MSBUILDP=x64
  set GENERATOR="Visual Studio 14 2015 Win64"
  goto :Build
  
  :Build
  
negative.code: 
  :NoVS
  @echo build.bat
  @echo  Visual Studio 2017 not found
  @echo  "%%VS150COMNTOOLS%%" environment variable not defined
  exit /B 1
  
  :Usage
  