How to ignore/block "replacement" mode via insert in RichTextBox?

Question

C++ / C#

It is necessary to make it so that when you press the insert key, the text in the RichTextBox is not replaced, but continues to "insert". How to do it?

Answer 1

Add a KeyDown event handler to the richTextBox instance and cancel the Insert hit :

private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
  if (e.KeyCode == Keys.Insert)
  {
    e.Handled = true;
    return;
  }
}