Event Handler to clear textboxes

I'm trying to create an event handler to clear the "Results" textbox if the text in any other box is changed. It has to be a wiring event and I am unsure exactly how to do this.

Here is my code (it works flawlessly minus the clearing Results):

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 Lab6_7_200 { public partial class Lab6 : Form {

public Lab6() { InitializeComponent(); }

private void Lab6_Load(object sender, EventArgs e) {

}

private void btnCalculate_Click(object sender, EventArgs e) { decimal value1 = Convert.ToDecimal(this.txtValue1.Text); //convert text to decimal decimal value2 = Convert.ToDecimal(this.txtValue2.Text); //convert text to decimal string operator1 = Convert.ToString(this.txtOperator.Text); //convert operator input to string decimal totalResult = this.GetResult(value1, value2, operator1); //sending values to method and calling it txtResult.Text = "" + totalResult; //writing into result textbox }

private void btnExit_Click(object sender, EventArgs e) { this.Close(); //closing the program }

private decimal GetResult(decimal value1, decimal value2, string operator1) //creating the method { decimal result = 0;

if (operator1 == "x") //determining the operator to be used { result = value1 * value2; //multiplication of the values }

else if (operator1 == "+") { result = value1 + value2; //addition of the values }

else if (operator1 == "-") { result = value1 - value2; //subtraction of the values }

else if (operator1 == "/") { result = value1 / value2; //division of the values }

return result; } } }