using System;
using System.Windows.Forms;
using System.Drawing;
using System.Threading;

class MainForm : Form
{
   static void Main()
   {
      Application.ThreadException += new ThreadExceptionEventHandler(ExceptionHandler);
      Application.Run(new MainForm());
   }

   static void ExceptionHandler(object sender, ThreadExceptionEventArgs args)
   {
      MessageBox.Show(args.Exception.ToString());
      Application.Exit();
   }

   Button btnDeposit;
   Button btnWithdraw;
   Button btnRead;
   TextBox txtAmount;
   Label lblAmount;
   Label lblResult;

   IAccount account;

   public MainForm()
   {
      this.ClientSize = new Size(300, 130);
      this.Text = "Bank Account";
      this.Load += new EventHandler(this_Load);
      btnDeposit = new Button();
      btnDeposit.Text = "Deposit";
      btnDeposit.Location = new Point(10, 10);
      btnDeposit.Click += new EventHandler(btnDeposit_Click);
      btnWithdraw = new Button();
      btnWithdraw.Text = "Withdraw";
      btnWithdraw.Location = new Point(110, 10);
      btnWithdraw.Click += new EventHandler(btnWithdraw_Click);
      btnRead = new Button();
      btnRead.Text = "Read";
      btnRead.Location = new Point(210, 10);
      btnRead.Click += new EventHandler(btnRead_Click);
      lblAmount = new Label();
      lblAmount.Text = "Amount:";
      lblAmount.Location = new Point(10, 50);
      txtAmount = new TextBox();
      txtAmount.Location = new Point(110, 50);
      txtAmount.Width = 170;
      lblResult = new Label();
      lblResult.BorderStyle = BorderStyle.FixedSingle;
      lblResult.Location = new Point(10, 90);
      lblResult.Width = 270;
      this.Controls.AddRange(
         new Control[]{btnDeposit, btnWithdraw, btnRead,
                       txtAmount, lblAmount, lblResult});

   }
   void this_Load(object sender, EventArgs args)
   {
      account = new Account();
   }
   void btnDeposit_Click(object sender, EventArgs args)
   {
      account.Deposit(Single.Parse(txtAmount.Text));
   }
   void btnWithdraw_Click(object sender, EventArgs args)
   {
      account.Withdraw(Single.Parse(txtAmount.Text));
   }
   void btnRead_Click(object sender, EventArgs args)
   {
      lblResult.Text = account.Read().ToString();
   }
}