How do I create a dll and call it for the compute button?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace RuleOf72
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (sender == radioButton1)
{
textBox3.Text = "Enter the number of years:";
textBox4.Text = "Rate for money to double:";
}
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
if (sender == radioButton2)
{
textBox3.Text = "Enter the rate:";
textBox4.Text = "Years for money to double:";
}
}
private void button1_Click(object sender, EventArgs e)
{
double seventyTwo = 72;
try
{
textBox2.Text = Convert.ToString(Convert.ToDouble(seventyTwo) / Convert.ToDouble(textBox1.Text));
}
catch (DivideByZeroException)
{
MessageBox.Show("Dividing by Zero is not permitted.", "Divide By Zero Exception",MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
catch (FormatException)
{
MessageBox.Show("Please enter a number", "Format Exception", MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void textBox3_TextChanged(object sender, EventArgs e)
{
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void textBox4_TextChanged(object sender, EventArgs e)
{
}
}
}