void InitializeKeyEnabledTimer()
        {
            KeyEnabledTimer = new System.Timers.Timer(200);
            KeyEnabledTimer.Elapsed += new System.Timers.ElapsedEventHandler(KeyEnabledTimer_Elapsed);
            KeyEnabledTimer.Enabled = true;
            Activated += new EventHandler(BaseForm_Activated);
            Deactivate += new EventHandler(BaseForm_Deactivate);
        }
        void KeyEnabledTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            MaxGlobal.EnableAccelerators();
            this.Text += " ##";
        }
        void BaseForm_Activated(object sender, EventArgs e)
        {
            KeyEnabledTimer.Enabled = true;
        }
        void BaseForm_Deactivate(object sender, EventArgs e)
        {
            KeyEnabledTimer.Enabled = false;
        }

form's title cant += "##"

but cant input key to txt box

thankyou