Crypto-Notepad/EncryptPad/ChangeKeyForm.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace EncryptPad
{
    public partial class ChangeKeyForm : Form
    {
        public ChangeKeyForm()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == MainWindow.key)
            {
                MainWindow.key = textBox2.Text;
                this.Close();
            }

           else if (textBox1.Text != MainWindow.key)
            {
                MessageBox.Show("Wrong old key!");
            }
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            if (textBox1.UseSystemPasswordChar == true)
            {
                textBox1.UseSystemPasswordChar = false;
                return;
            }

            if (textBox1.UseSystemPasswordChar == false)
            {
                textBox1.UseSystemPasswordChar = true;
                return;
            }
        }

        private void pictureBox2_Click(object sender, EventArgs e)
        {
            if (textBox2.UseSystemPasswordChar == true)
            {
                textBox2.UseSystemPasswordChar = false;
                return;
            }

            if (textBox2.UseSystemPasswordChar == false)
            {
                textBox2.UseSystemPasswordChar = true;
                return;
            }
        }
    }
}