using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.Office.Interop.Word;
using System.Reflection;

namespace SpellCheckDemo
{
	/// 

	/// Summary description for Form1.
	/// 

	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button btnSpellCheck;
		private System.Windows.Forms.Label label1;
		/// 

		/// Required designer variable.
		/// 

		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// 

		/// Clean up any resources being used.
		/// 

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// 

		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// 

		private void InitializeComponent()
		{
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.btnSpellCheck = new System.Windows.Forms.Button();
            this.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(40, 40);
            this.textBox1.Multiline = true;
            this.textBox1.Name = "textBox1";
            this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.textBox1.Size = new System.Drawing.Size(344, 136);
            this.textBox1.TabIndex = 0;
            // 
            // btnSpellCheck
            // 
            this.btnSpellCheck.Location = new System.Drawing.Point(392, 40);
            this.btnSpellCheck.Name = "btnSpellCheck";
            this.btnSpellCheck.Size = new System.Drawing.Size(96, 23);
            this.btnSpellCheck.TabIndex = 1;
            this.btnSpellCheck.Text = "Spell Check";
            this.btnSpellCheck.Click += new System.EventHandler(this.btnSpellCheck_Click);
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(40, 24);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(336, 16);
            this.label1.TabIndex = 2;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(496, 205);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.btnSpellCheck);
            this.Controls.Add(this.textBox1);
            this.Name = "Form1";
            this.Text = "SpellCheckDemo";
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion

		/// 

		/// The main entry point for the application.
		/// 

		[STAThread]
		static void Main()
		{
			System.Windows.Forms.Application.Run(new Form1());
		}

		private void btnSpellCheck_Click(object sender, System.EventArgs e)
		{
			SpellCheck(textBox1 , label1   );
		}

		public void SpellCheck(TextBox tBox, Label lLbl)
		{
			int iErrorCount = 0;
            Microsoft.Office.Interop.Word.Application app = new Microsoft.Office.Interop.Word.Application();
			if (tBox.Text.Length > 0)
			{
				app.Visible=false;
				// Setting these variables is comparable to passing null to the function.
				// This is necessary because the C# null cannot be passed by reference.
				object template=Missing.Value;
				object newTemplate=Missing.Value;
				object documentType=Missing.Value;
				object visible=true;
				object optional = Missing.Value;
			
				_Document doc = app.Documents.Add(ref template, ref newTemplate, ref documentType, ref visible);
				doc.Words.First.InsertBefore (tBox.Text );
				ProofreadingErrors we =  doc.SpellingErrors;
				iErrorCount = we.Count;

				doc.CheckSpelling( ref optional, ref optional, ref optional, ref optional,
					ref optional, ref optional, ref optional,
					ref optional, ref optional, ref optional, ref optional, ref optional);
	
				if (iErrorCount == 0)
					lLbl.Text = "Spelling is correct. No errors corrected ";
				else if (iErrorCount == 1)
					lLbl.Text = "Spelling is correct now. 1 error corrected ";
				else
					lLbl.Text = "Spelling is correct now. " + iErrorCount + " errors corrected ";
				object first=0;
				object last=doc.Characters.Count -1; 			
			
				tBox.Text = doc.Range(ref first, ref last).Text; 				
			}
			else
				lLbl.Text = "Textbox is empty";

			object saveChanges = false;
			object originalFormat = Missing.Value;
			object routeDocument = Missing.Value;
			app.Quit(ref saveChanges, ref originalFormat, ref routeDocument);
		}
	}
}