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 Microsoft.Office.Interop.Word;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form 
    {
        public Form1()
        {
            InitializeComponent();
            main();
        }

        private void main()
        {

            Microsoft.Office.Interop.Word.Application word = new ApplicationClass();
            Type wordType = word.GetType();
            Microsoft.Office.Interop.Word.Documents docs = word.Documents;
            Type docsType = docs.GetType();
            object fileName = "D://Test.docs";
            Microsoft.Office.Interop.Word.Document doc = (Document)docsType.InvokeMember("Open", System.Reflection.BindingFlags.InvokeMethod, null, docs, new Object[] { fileName, true, true });
            Type docType = doc.GetType();
            object saveFileName = "D://temp.html";
            docType.InvokeMember("SaveAs", System.Reflection.BindingFlags.InvokeMethod, null, doc, new object[] { saveFileName, WdSaveFormat.wdFormatHTML });
            wordType.InvokeMember("Quit", System.Reflection.BindingFlags.InvokeMethod, null, word, null);

        }


    }
}