delphi – 创建*. Mht文件(网络档案)

function TLessonConstructor2.CreateMHT( const FileName : string):boolean ;
 var
  oMSG:IMessage;
  oConfig: IConfiguration;
  sFileName: string;
  Stream: _Stream;
begin
  //CoInitializeEx(nil,COINIT_APARTMENTTHREADED);
  //CoInitialize(nil);
  try
    Result  := false;
    sFileName := ChangeFileExt(FileName,'.mht');
    DeleteFile(PAnsiChar(sFileName));
    try
    oConfig := CoConfiguration.Create();
    oMSG    := CoMessage.Create();
    oMSG.Configuration := oConfig;
    oMSG.CreateMHTMLBody(FileName,CdoSuppressNone,'','');
    Stream:=oMSG.GetStream;
    Stream.SaveToFile(sFileName,adSaveCreateOverWrite);
    Stream.Cancel;
    Stream.Close;
    Result := True;
    except
      on E: Exception do
      begin
       Result  := false;
       MessageDlg(E.Message,mtError,[mbOK],0);
      end;
    end;
  finally
  //  CoUnInitialize;
    Stream:=nil;
    oConfig:=nil;
    oMSG:=nil;
  end;
end;

FileName – html的完整路径.

执行oMSG.CreateMHTMLBody(FileName,”,”)之后;只要基本过程完成,该文件就会被锁定.但是,处理后应删除此文件.

知道问题是什么吗？