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

namespace Example68
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.TextBox txtPurchase;
		private System.Windows.Forms.TextBox txtTotalDue;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label lblTaxPercentage;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

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

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

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.txtPurchase = new System.Windows.Forms.TextBox();
			this.txtTotalDue = new System.Windows.Forms.TextBox();
			this.lblTaxPercentage = new System.Windows.Forms.Label();
			this.button1 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("Lucida Handwriting", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label1.Location = new System.Drawing.Point(56, 24);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(192, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "Tax Calculator";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(24, 72);
			this.label2.Name = "label2";
			this.label2.TabIndex = 1;
			this.label2.Text = "Total Amount:";
			this.label2.Click += new System.EventHandler(this.label2_Click);
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(24, 112);
			this.label3.Name = "label3";
			this.label3.TabIndex = 2;
			this.label3.Text = "Tax Percentage:";
			this.label3.Click += new System.EventHandler(this.label3_Click);
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(24, 160);
			this.label4.Name = "label4";
			this.label4.TabIndex = 3;
			this.label4.Text = "Total Due:";
			this.label4.Click += new System.EventHandler(this.label4_Click);
			// 
			// txtPurchase
			// 
			this.txtPurchase.Location = new System.Drawing.Point(144, 72);
			this.txtPurchase.Name = "txtPurchase";
			this.txtPurchase.TabIndex = 4;
			this.txtPurchase.Text = "";
			// 
			// txtTotalDue
			// 
			this.txtTotalDue.Location = new System.Drawing.Point(152, 152);
			this.txtTotalDue.Name = "txtTotalDue";
			this.txtTotalDue.TabIndex = 5;
			this.txtTotalDue.Text = "";
			// 
			// lblTaxPercentage
			// 
			this.lblTaxPercentage.BackColor = System.Drawing.Color.Coral;
			this.lblTaxPercentage.Location = new System.Drawing.Point(152, 112);
			this.lblTaxPercentage.Name = "lblTaxPercentage";
			this.lblTaxPercentage.Size = new System.Drawing.Size(32, 23);
			this.lblTaxPercentage.TabIndex = 6;
			this.lblTaxPercentage.Text = "7.5%";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(112, 208);
			this.button1.Name = "button1";
			this.button1.TabIndex = 7;
			this.button1.Text = "Compute";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.lblTaxPercentage);
			this.Controls.Add(this.txtTotalDue);
			this.Controls.Add(this.txtPurchase);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Name = "Form1";
			this.Text = "Tax Calculator";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
		
		}

		private void label4_Click(object sender, System.EventArgs e)
		{
		
		}

		private void label3_Click(object sender, System.EventArgs e)
		{
		
		}

		private void label2_Click(object sender, System.EventArgs e)
		{
			
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			double purchaseAmount = double.Parse(txtPurchase.Text);

			lblTaxPercentage.Text = lblTaxPercentage.Text.Trim();

			double percentage =
				double.Parse(lblTaxPercentage.Text.Remove(
				lblTaxPercentage.Text.Length - 1, 1)) / 100.0;

			txtTotalDue.Text = string.Format("{0:C}",
				(purchaseAmount * percentage) + 
				purchaseAmount).ToString();
		}
	}
}