调用打印机厂家的DLL 怎么 多线程打印

紧急求助 调用打印机厂家的DLL 如何 多线程打印
厂家提供的POSDLL.dll 

C# code

    /// <summary>    /// 北洋OPOS指令集二次开发包DLL调用      ///       public class BeiYangOPOS    {        const string _DllVer = "1.4";        /// <summary>        /// 获取动态库版本号        /// </summary>        public string GetDllVer        {            get { return _DllVer; }        }        /// <summary>        /// 设备打开后的句柄        /// </summary>        public IntPtr POS_IntPtr;//打开打印机         [DllImport("POSDLL.dll", CharSet = CharSet.Ansi)]      public static extern IntPtr POS_Open([MarshalAs(UnmanagedType.LPStr)]string lpName,uint nComBaudrate,uint nComDataBits,uint nComStopBits,uint nComParity,uint nParam);//关闭打印机        [DllImport("POSDLL.dll", SetLastError = true)]        public static extern IntPtr POS_Close();//输出文本        [DllImport("POSDLL.dll", SetLastError = true)]        public static extern IntPtr POS_S_TextOut([MarshalAs(UnmanagedType.LPStr)]string pszString,uint nOrgx, uint nWidthTimes, uint nHeightTimes,uint nFontType, uint nFontStyle);}

C# code

            foreach (KeyValuePair<string, PosPrinter> pos in poss) //循环所有打印机            {                pos.Value.Work();              //执行打印机任务            }

然后打印机任务里是这样写的

C# code

        public void Work()        {            Thread worker = new Thread(new ThreadStart(PrintWork));            worker.Start();        }    public void PrintWork()        {            string err = string.Empty;          opos.OpenNetPort(ip);            foreach (string Work in Works)            {                BeiYangOPOS.POS_S_TextOut(Work, 0, 1, 2, opos.POS_FONT_TYPE_STANDARD, opos.POS_FONT_STYLE_NORMAL);                BeiYangOPOS.POS_S_TextOut(this.ip, 0, 1, 3, opos.POS_FONT_TYPE_STANDARD, opos.POS_FONT_STYLE_NORMAL);                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_CutPaper(0, 200);                BeiYangOPOS.POS_FeedLine();                BeiYangOPOS.POS_FeedLine();            }         opos.ClosePrinterPort();

由于厂家提供的dll 里 都必须是static 所以打印的内容都窜了共享冲突 不同的任务都打印到某一台去了 有没有办法解决这个问题

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