C#初始化银海医保接口的问题

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;

using yh_interface;

using System.Reflection;





namespace YH

{

    public partial class ff : Form

    {



      //  System.Type yh = Type.GetTypeFromProgID("YinHai.SCMYInterface");

     

        

    //    Object yhObject;



       

     

    



        public ff()

        {

            InitializeComponent();

        }

        //业务接口函数

        public static short li_appcode = -1;

        public static string ls_appmsg = "";

        public static string a = "";



        //初始化接口





        public static bool JK_Init()

        {

            COClass_n_yh_interface YH = new COClass_n_yh_interface();

            // System.Type yh = Type.GetTypeFromProgID("YinHai.SCMYInterface");





            YH.yh_interface_init(a, li_appcode, ls_appmsg);



            if (ff.li_appcode >= 0)

            {

                return true;

            }

            return false;

        }

        #region 初始化

        private void button1_Click(object sender, EventArgs e)

        {

            JK_Init();

        }

        #endregion