I bet you can’t type an A!

Keys got special meaning and shouldn’t be fed into parts of the GUI? This handy little snippet takes care of that job:

private string text = "I bet you can't type an A!"; 

static void DisableKeys( KeyCode[] keys )
{
    if( !Event.current.isKey )
    {
        return;
    }

    foreach( KeyCode key in keys )
    {
        if( Event.current.keyCode == key )
        {
            Event.current.Use();
        }
    }
}

static void DisableKey( KeyCode key )
{
    DisableKeys( new KeyCode[]{ key } );
}

void OnGUI()
{
    DisableKey( KeyCode.A );
    text = GUILayout.TextArea( text );
}