void SawFormClosed(object sender, System.Windows.Forms.FormClosedEventArgs e)
{
_saw.Dispose();
_saw = null;
}
void HkHotKeyPressed(string HotKeyID)
{
if (_saw != null) return;
_saw = new SmartAddWindow();
_saw.FormClosed += new System.Windows.Forms.FormClosedEventHandler(SawFormClosed);
_saw.Show();
}