Cancel Key press event

Question

How can I return the key?, mean if I want to allow only integer values in the textbox, how can I don\'t allow user to not enter non-integers, regarding, KeyPress

Answer 1

Create a string with the characters you what to allow the user to enter.

Use KeyDown or KeyUp to handle Special keys

private void tbN1_KeyPress(object sender, KeyPressEventArgs e)
{
    String sKeys = "1234567890ABCDEF";
    if (!sKeys.Contains(e.KeyChar.ToString().ToUpper()))
        e.Handled = true;
}