MS word Automation

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Microsoft.Office;

using Microsoft.Office.Interop.Word;

using Word = Microsoft.Office.Interop.Word;

namespace CreditRequest

{

public partial class CreditRequest : Form

{

int iTotalFields = 0;

public CreditRequest()

{

InitializeComponent();

}

private void btn_Generate_Click(object sender, EventArgs e)

{

Object oMissing = System.Reflection.Missing.Value;

Object oTrue = true;

Object oFalse = false;

Word.Application oWord = new Word.Application();

Word.Document oWordDoc = new Word.Document();

oWord.Visible = true;

Object oTemplatePath = "C:\\Template.dot";

oWordDoc = oWord.Documents.Add(ref oTemplatePath, ref oMissing, ref oMissing, ref oMissing);

foreach (Word.Field myMergeField in oWordDoc.Fields)

{

iTotalFields++;

Word.Range rngFieldCode = myMergeField.Code;

String fieldText = rngFieldCode.Text;

if (fieldText.StartsWith(" MERGEFIELD"))

{

Int32 endMerge = fieldText.IndexOf("\\");

Int32 fieldNameLength = fieldText.Length - endMerge;

String fieldName = fieldText.Substring(11, endMerge - 11);

fieldName = fieldName.Trim();

if (fieldName == "Name")

{

myMergeField.Select();

oWord.Selection.TypeText(txt_CustName.Text);

}

if (fieldName == "Date")

{

myMergeField.Select();

oWord.Selection.TypeText(dtp_CreditDate.Text);

}

if (fieldName == "Country")

{

myMergeField.Select();

oWord.Selection.TypeText(txt_DestCountry.Text);

}

}

}

}

}

} Refer : http://social.msdn.microsoft.com/Forums/en-US/csharplanguage/thread/1a100644-da0f-482c-8042-339a8ff1658a