form1.cs

Hiding Text in a Image

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Text;

namespace PictureKey
{
	/// <summary>
	/// Zusammendfassende Beschreibung f黵 Form1.
	/// </summary>
	public class frmMain : System.Windows.Forms.Form
	{
		private System.Windows.Forms.GroupBox grpPicture;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox txtImageFile;
		private System.Windows.Forms.PictureBox picImage;
		private System.Windows.Forms.Button btnImageFile;
		private System.Windows.Forms.TextBox txtKeyFile;
		private System.Windows.Forms.RadioButton rdoKeyText;
		private System.Windows.Forms.GroupBox grpKey;
		private System.Windows.Forms.TextBox txtKeyText;
		private System.Windows.Forms.RadioButton rdoKeyFile;
		private System.Windows.Forms.Button btnHide;
		private System.Windows.Forms.Button btnExtract;
		private System.Windows.Forms.TabControl tabControl1;
		private System.Windows.Forms.TabPage tabPage1;
		private System.Windows.Forms.TabPage tabPage2;
		private System.Windows.Forms.Button btnSaveBitmap;
		private System.Windows.Forms.GroupBox grpMessage;
		private System.Windows.Forms.RadioButton rdoMessageText;
		private System.Windows.Forms.TextBox txtMessageFile;
		private System.Windows.Forms.TextBox txtMessageText;
		private System.Windows.Forms.Button btnMessage;
		private System.Windows.Forms.RadioButton rdoMessageFile;
		private System.Windows.Forms.GroupBox groupBox3;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Button btnKeyFile;
		private System.Windows.Forms.TextBox txtExtractedMsgFile;
		private System.Windows.Forms.Button btnExtractedMsgFile;
		private System.Windows.Forms.TextBox txtExtractedMsgText;
		private System.Windows.Forms.CheckBox chkGrayscale;
		
		private System.ComponentModel.Container components = null;

		public frmMain()
		{
			//
			// Erforderlich f黵 die Windows Form-Designerunterst黷zung
			//
			InitializeComponent();
		}

		/// <summary>Cleanup</summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Erforderliche Methode f黵 die Designerunterst黷zung. 
		/// Der Inhalt der Methode darf nicht mit dem Code-Editor ge鋘dert werden.
		/// </summary>
		private void InitializeComponent()
		{
			this.grpPicture = new System.Windows.Forms.GroupBox();
			this.label2 = new System.Windows.Forms.Label();
			this.txtImageFile = new System.Windows.Forms.TextBox();
			this.picImage = new System.Windows.Forms.PictureBox();
			this.btnImageFile = new System.Windows.Forms.Button();
			this.txtKeyFile = new System.Windows.Forms.TextBox();
			this.rdoKeyText = new System.Windows.Forms.RadioButton();
			this.grpKey = new System.Windows.Forms.GroupBox();
			this.txtKeyText = new System.Windows.Forms.TextBox();
			this.btnKeyFile = new System.Windows.Forms.Button();
			this.rdoKeyFile = new System.Windows.Forms.RadioButton();
			this.btnHide = new System.Windows.Forms.Button();
			this.btnExtract = new System.Windows.Forms.Button();
			this.tabControl1 = new System.Windows.Forms.TabControl();
			this.tabPage1 = new System.Windows.Forms.TabPage();
			this.grpMessage = new System.Windows.Forms.GroupBox();
			this.rdoMessageText = new System.Windows.Forms.RadioButton();
			this.txtMessageFile = new System.Windows.Forms.TextBox();
			this.txtMessageText = new System.Windows.Forms.TextBox();
			this.btnMessage = new System.Windows.Forms.Button();
			this.rdoMessageFile = new System.Windows.Forms.RadioButton();
			this.btnSaveBitmap = new System.Windows.Forms.Button();
			this.chkGrayscale = new System.Windows.Forms.CheckBox();
			this.tabPage2 = new System.Windows.Forms.TabPage();
			this.groupBox3 = new System.Windows.Forms.GroupBox();
			this.label1 = new System.Windows.Forms.Label();
			this.txtExtractedMsgFile = new System.Windows.Forms.TextBox();
			this.txtExtractedMsgText = new System.Windows.Forms.TextBox();
			this.btnExtractedMsgFile = new System.Windows.Forms.Button();
			this.label3 = new System.Windows.Forms.Label();
			this.grpPicture.SuspendLayout();
			this.grpKey.SuspendLayout();
			this.tabControl1.SuspendLayout();
			this.tabPage1.SuspendLayout();
			this.grpMessage.SuspendLayout();
			this.tabPage2.SuspendLayout();
			this.groupBox3.SuspendLayout();
			this.SuspendLayout();
			// 
			// grpPicture
			// 
			this.grpPicture.Controls.AddRange(new System.Windows.Forms.Control[] {
																					 this.label2,
																					 this.txtImageFile,
																					 this.picImage,
																					 this.btnImageFile});
			this.grpPicture.Location = new System.Drawing.Point(16, 16);
			this.grpPicture.Name = "grpPicture";
			this.grpPicture.Size = new System.Drawing.Size(480, 296);
			this.grpPicture.TabIndex = 0;
			this.grpPicture.TabStop = false;
			this.grpPicture.Text = "Carrier Bitmap (no image loaded)";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 32);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(64, 23);
			this.label2.TabIndex = 5;
			this.label2.Text = "Filename";
			// 
			// txtImageFile
			// 
			this.txtImageFile.Location = new System.Drawing.Point(88, 32);
			this.txtImageFile.Name = "txtImageFile";
			this.txtImageFile.Size = new System.Drawing.Size(296, 22);
			this.txtImageFile.TabIndex = 0;
			this.txtImageFile.Text = "";
			this.txtImageFile.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txtImageFile_KeyDown);
			// 
			// picImage
			// 
			this.picImage.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.picImage.Location = new System.Drawing.Point(16, 64);
			this.picImage.Name = "picImage";
			this.picImage.Size = new System.Drawing.Size(448, 216);
			this.picImage.TabIndex = 0;
			this.picImage.TabStop = false;
			// 
			// btnImageFile
			// 
			this.btnImageFile.Location = new System.Drawing.Point(384, 32);
			this.btnImageFile.Name = "btnImageFile";
			this.btnImageFile.Size = new System.Drawing.Size(80, 23);
			this.btnImageFile.TabIndex = 1;
			this.btnImageFile.Text = "Browse...";
			this.btnImageFile.Click += new System.EventHandler(this.btnImageFile_Click);
			// 
			// txtKeyFile
			// 
			this.txtKeyFile.Location = new System.Drawing.Point(112, 24);
			this.txtKeyFile.Name = "txtKeyFile";
			this.txtKeyFile.Size = new System.Drawing.Size(272, 22);
			this.txtKeyFile.TabIndex = 1;
			this.txtKeyFile.Text = "";
			// 
			// rdoKeyText
			// 
			this.rdoKeyText.Checked = true;
			this.rdoKeyText.Location = new System.Drawing.Point(16, 56);
			this.rdoKeyText.Name = "rdoKeyText";
			this.rdoKeyText.Size = new System.Drawing.Size(80, 24);
			this.rdoKeyText.TabIndex = 3;
			this.rdoKeyText.TabStop = true;
			this.rdoKeyText.Text = "Text";
			this.rdoKeyText.Click += new System.EventHandler(this.rdoKey_Click);
			// 
			// grpKey
			// 
			this.grpKey.Controls.AddRange(new System.Windows.Forms.Control[] {
																				 this.rdoKeyText,
																				 this.txtKeyFile,
																				 this.txtKeyText,
																				 this.btnKeyFile,
																				 this.rdoKeyFile});
			this.grpKey.Location = new System.Drawing.Point(16, 320);
			this.grpKey.Name = "grpKey";
			this.grpKey.Size = new System.Drawing.Size(480, 96);
			this.grpKey.TabIndex = 1;
			this.grpKey.TabStop = false;
			this.grpKey.Text = "Key";
			// 
			// txtKeyText
			// 
			this.txtKeyText.Location = new System.Drawing.Point(112, 56);
			this.txtKeyText.Name = "txtKeyText";
			this.txtKeyText.Size = new System.Drawing.Size(352, 22);
			this.txtKeyText.TabIndex = 4;
			this.txtKeyText.Text = "";
			// 
			// btnKeyFile
			// 
			this.btnKeyFile.Location = new System.Drawing.Point(384, 24);
			this.btnKeyFile.Name = "btnKeyFile";
			this.btnKeyFile.Size = new System.Drawing.Size(80, 23);
			this.btnKeyFile.TabIndex = 2;
			this.btnKeyFile.Text = "Browse...";
			this.btnKeyFile.Click += new System.EventHandler(this.btnKeyFile_Click);
			// 
			// rdoKeyFile
			// 
			this.rdoKeyFile.Location = new System.Drawing.Point(16, 24);
			this.rdoKeyFile.Name = "rdoKeyFile";
			this.rdoKeyFile.Size = new System.Drawing.Size(88, 24);
			this.rdoKeyFile.TabIndex = 0;
			this.rdoKeyFile.Text = "Filename";
			this.rdoKeyFile.Click += new System.EventHandler(this.rdoKey_Click);
			// 
			// btnHide
			// 
			this.btnHide.Enabled = false;
			this.btnHide.Location = new System.Drawing.Point(280, 296);
			this.btnHide.Name = "btnHide";
			this.btnHide.Size = new System.Drawing.Size(160, 23);
			this.btnHide.TabIndex = 2;
			this.btnHide.Text = "Hide Message";
			this.btnHide.Click += new System.EventHandler(this.btnHide_Click);
			// 
			// btnExtract
			// 
			this.btnExtract.Enabled = false;
			this.btnExtract.Location = new System.Drawing.Point(280, 328);
			this.btnExtract.Name = "btnExtract";
			this.btnExtract.Size = new System.Drawing.Size(160, 23);
			this.btnExtract.TabIndex = 2;
			this.btnExtract.Text = "Extract Hidden Text";
			this.btnExtract.Click += new System.EventHandler(this.btnExtract_Click);
			// 
			// tabControl1
			// 
			this.tabControl1.Controls.AddRange(new System.Windows.Forms.Control[] {
																					  this.tabPage1,
																					  this.tabPage2});
			this.tabControl1.Location = new System.Drawing.Point(504, 24);
			this.tabControl1.Name = "tabControl1";
			this.tabControl1.SelectedIndex = 0;
			this.tabControl1.Size = new System.Drawing.Size(464, 392);
			this.tabControl1.TabIndex = 2;
			// 
			// tabPage1
			// 
			this.tabPage1.Controls.AddRange(new System.Windows.Forms.Control[] {
																				   this.grpMessage,
																				   this.btnHide,
																				   this.btnSaveBitmap,
																				   this.chkGrayscale});
			this.tabPage1.Location = new System.Drawing.Point(4, 25);
			this.tabPage1.Name = "tabPage1";
			this.tabPage1.Size = new System.Drawing.Size(456, 363);
			this.tabPage1.TabIndex = 0;
			this.tabPage1.Text = "Hide";
			// 
			// grpMessage
			// 
			this.grpMessage.Controls.AddRange(new System.Windows.Forms.Control[] {
																					 this.rdoMessageText,
																					 this.txtMessageFile,
																					 this.txtMessageText,
																					 this.btnMessage,
																					 this.rdoMessageFile});
			this.grpMessage.Location = new System.Drawing.Point(16, 16);
			this.grpMessage.Name = "grpMessage";
			this.grpMessage.Size = new System.Drawing.Size(424, 264);
			this.grpMessage.TabIndex = 0;
			this.grpMessage.TabStop = false;
			this.grpMessage.Text = "Message";
			// 
			// rdoMessageText
			// 
			this.rdoMessageText.Checked = true;
			this.rdoMessageText.Location = new System.Drawing.Point(16, 48);
			this.rdoMessageText.Name = "rdoMessageText";
			this.rdoMessageText.Size = new System.Drawing.Size(72, 24);
			this.rdoMessageText.TabIndex = 3;
			this.rdoMessageText.TabStop = true;
			this.rdoMessageText.Text = "Text";
			this.rdoMessageText.Click += new System.EventHandler(this.rdoMessage_Click);
			// 
			// txtMessageFile
			// 
			this.txtMessageFile.Location = new System.Drawing.Point(104, 24);
			this.txtMessageFile.Name = "txtMessageFile";
			this.txtMessageFile.Size = new System.Drawing.Size(232, 22);
			this.txtMessageFile.TabIndex = 1;
			this.txtMessageFile.Text = "";
			this.txtMessageFile.Enter += new System.EventHandler(this.txtMessageFile_Enter);
			// 
			// txtMessageText
			// 
			this.txtMessageText.Location = new System.Drawing.Point(8, 72);
			this.txtMessageText.Multiline = true;
			this.txtMessageText.Name = "txtMessageText";
			this.txtMessageText.Size = new System.Drawing.Size(408, 176);
			this.txtMessageText.TabIndex = 4;
			this.txtMessageText.Text = "";
			this.txtMessageText.Enter += new System.EventHandler(this.txtMessageText_Enter);
			// 
			// btnMessage
			// 
			this.btnMessage.Location = new System.Drawing.Point(336, 24);
			this.btnMessage.Name = "btnMessage";
			this.btnMessage.Size = new System.Drawing.Size(80, 23);
			this.btnMessage.TabIndex = 2;
			this.btnMessage.Text = "Browse...";
			this.btnMessage.Click += new System.EventHandler(this.btnMessage_Click);
			// 
			// rdoMessageFile
			// 
			this.rdoMessageFile.Location = new System.Drawing.Point(16, 24);
			this.rdoMessageFile.Name = "rdoMessageFile";
			this.rdoMessageFile.Size = new System.Drawing.Size(88, 24);
			this.rdoMessageFile.TabIndex = 0;
			this.rdoMessageFile.Text = "Filename";
			this.rdoMessageFile.Click += new System.EventHandler(this.rdoMessage_Click);
			// 
			// btnSaveBitmap
			// 
			this.btnSaveBitmap.Enabled = false;