No Events on keybord changed

Mar 17, 2015 at 3:31 PM
Hi to all,
I cannot know when the user left the control (LostFocus).
Basicaly NO events are working !!!

Do I missing anything?
EX:
    private void RemarksTB_KeyUp(object sender, KeyEventArgs e)
    {
        ChkUpdValues();
    }
or
    private void RemarksTB_KeyDown(object sender, KeyEventArgs e)
    {
        ChkUpdValues();
    }
or
    private void RemarksTB_TextInput(object sender, TextCompositionEventArgs e)
    {
        ChkUpdValues();
    }


thanks in advance