There are various ways to close an application by pressing the Escape button, using C#. Here are a few:
Way 1: Simply add the below given code in your Windows program:
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == Keys.Escape) this.Close();
bool res = base.ProcessCmdKey(ref msg, keyData);
return res;
}
Way 2: Write the below code in the KeyPress event of a form:
if (e.KeyChar == (char)27)
this.Close();
Way 3: Select properties of Form and select 'KeyPreview' and change it from 'false' to 'true'. [By default, its value is false.] Then write the below code in the KeyUp event of the Form:
private void Form1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Escape)
this.Close();
}