anchor.diff:    'LRESULT': 'IntPtr',
     'DESKTOP_WALLPAPER_POSITION': 'Int32',
     'WNDPROC': 'IntPtr',
  +  'REFGUID': 'GUID',
     'INT': 'Int32',
     'UINT': 'Uint32',
     'DWORD': 'Uint32',
  
positive.code:   'DESKTOP_SLIDESHOW_OPTIONS': 'Int32',
    'DESKTOP_SLIDESHOW_DIRECTION': 'Int32',
    'DESKTOP_SLIDESHOW_STATE': 'Int32',
    'COLORREF': 'Uint32',
    'RECT': 'RECT',
    'IShellItemArray': 'Pointer',
    'IWbemClassObject': 'Pointer',
    'IWbemObjectSink': 'Pointer',
    'IEnumWbemClassObject': 'Pointer'
  };
  
  const intTypes = <String>[
  
negative.code: }
  
  String printHeader(Interface interface) {
    return '''
  import 'dart:ffi';
  
  import 'package:ffi/ffi.dart';
  
  import '${interface.inherits}.dart';
  import 'combase.dart';
  import 'comerrors.dart';
  
  