static MagickBooleanType InvokePDFDelegate(const MagickBooleanType verbose,
  const char *command,char *message,ExceptionInfo *exception)
{
  int
    status;

#if defined(MAGICKCORE_GS_DELEGATE) || defined(MAGICKCORE_WINDOWS_SUPPORT)
#define SetArgsStart(command,args_start) \
  if (args_start == (const char *) NULL) \
    { \
      if (*command != '"') \
        args_start=strchr(command,' '); \
      else \
        { \
          args_start=strchr(command+1,'"'); \
          if (args_start != (const char *) NULL) \
            args_start++; \
        } \
    }

#define ExecuteGhostscriptCommand(command,status) \
{ \
  status=ExternalDelegateCommand(MagickFalse,verbose,command,message, \
    exception); \
  if (status == 0) \
    return(MagickTrue); \
  if (status < 0) \
    return(MagickFalse); \
  (void) ThrowMagickException(exception,GetMagickModule(),DelegateError, \
    "FailedToExecuteCommand","`%s' (%d)",command,status); \
  return(MagickFalse); \
}

  char
    **argv,
    *errors;

  const char
    *args_start = (const char *) NULL;

  const GhostInfo
    *ghost_info;

  gs_main_instance
    *interpreter;

  gsapi_revision_t
    revision;

  int
    argc,
    code;

  register ssize_t
    i;

#if defined(MAGICKCORE_WINDOWS_SUPPORT)
  ghost_info=NTGhostscriptDLLVectors();
#else
  GhostInfo
    ghost_info_struct;

  ghost_info=(&ghost_info_struct);
  (void) ResetMagickMemory(&ghost_info_struct,0,sizeof(ghost_info_struct));
  ghost_info_struct.delete_instance=(void (*)(gs_main_instance *))
    gsapi_delete_instance;
  ghost_info_struct.exit=(int (*)(gs_main_instance *)) gsapi_exit;
  ghost_info_struct.new_instance=(int (*)(gs_main_instance **,void *))
    gsapi_new_instance;
  ghost_info_struct.init_with_args=(int (*)(gs_main_instance *,int,char **))
    gsapi_init_with_args;
  ghost_info_struct.run_string=(int (*)(gs_main_instance *,const char *,int,
    int *)) gsapi_run_string;
  ghost_info_struct.set_stdio=(int (*)(gs_main_instance *,int(*)(void *,char *,
    int),int(*)(void *,const char *,int),int(*)(void *, const char *, int)))
    gsapi_set_stdio;
  ghost_info_struct.revision=(int (*)(gsapi_revision_t *,int)) gsapi_revision;
#endif
  if (ghost_info == (GhostInfo *) NULL)
    ExecuteGhostscriptCommand(command,status);
  if ((ghost_info->revision)(&revision,sizeof(revision)) != 0)
    revision.revision=0;
  if (verbose != MagickFalse)
    {
      (void) fprintf(stdout,"[ghostscript library %.2f]",(double)
        revision.revision/100.0);
      SetArgsStart(command,args_start);
      (void) fputs(args_start,stdout);
    }
  errors=(char *) NULL;
  status=(ghost_info->new_instance)(&interpreter,(void *) &errors);
  if (status < 0)
    ExecuteGhostscriptCommand(command,status);
  code=0;
  argv=StringToArgv(command,&argc);
  if (argv == (char **) NULL)
    {
      (ghost_info->delete_instance)(interpreter);
      return(MagickFalse);
    }
  (void) (ghost_info->set_stdio)(interpreter,(int(MagickDLLCall *)(void *,
    char *,int)) NULL,PDFDelegateMessage,PDFDelegateMessage);
  status=(ghost_info->init_with_args)(interpreter,argc-1,argv+1);
  if (status == 0)
    status=(ghost_info->run_string)(interpreter,"systemdict /start get exec\n",
      0,&code);
  (ghost_info->exit)(interpreter);
  (ghost_info->delete_instance)(interpreter);
  for (i=0; i < (ssize_t) argc; i++)
    argv[i]=DestroyString(argv[i]);
  argv=(char **) RelinquishMagickMemory(argv);
  if (status != 0)
    {
      SetArgsStart(command,args_start);
      if (status == -101) /* quit */
        (void) FormatLocaleString(message,MagickPathExtent,
          "[ghostscript library %.2f]%s: %s",(double)revision.revision / 100,
          args_start,errors);
      else
        {
          (void) ThrowMagickException(exception,GetMagickModule(),
            DelegateError,"PDFDelegateFailed",
            "`[ghostscript library %.2f]%s': %s",
            (double)revision.revision / 100,args_start,errors);
          if (errors != (char *) NULL)
            errors=DestroyString(errors);
          (void) LogMagickEvent(CoderEvent,GetMagickModule(),
            "Ghostscript returns status %d, exit code %d",status,code);
          return(MagickFalse);
        }
    }
  if (errors != (char *) NULL)
    errors=DestroyString(errors);
  return(MagickTrue);
#else
  status=ExternalDelegateCommand(MagickFalse,verbose,command,message,exception);
  return(status == 0 ? MagickTrue : MagickFalse);
#endif
}