public Form1()
        {
            InitializeComponent();
            Resize += Form1_Resize;
            Load += Form1_Load;
            HOTKEY_ACTIVE += Start;
            FormClosing += Form1_FormClosing;


            Api.RegisterHotKey(Handle, 1, HotKey.FsModifiers.None, Keys.Tab);
        }

        public Form1()
        {
            InitializeComponent();
            Resize += Form1_Resize;
            Load += Form1_Load;
            HOTKEY_ACTIVE += Start;
            FormClosing += Form1_FormClosing;


            Api.RegisterHotKey(Handle, 1, HotKey.FsModifiers.None, Keys.Tab);
        }

 void Form1_KeyDown(object sender, KeyEventArgs e)
        {


            MessageBox.Show(e.KeyCode.ToString());
            if (e.KeyCode == Keys.Tab)
            {

                MessageBox.Show("OH!");
                }

        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (keyData == Keys.Tab)
            {
                object sender = Control.FromHandle(msg.HWnd);
                KeyEventArgs e = new KeyEventArgs(keyData);
                Form1_KeyDown(sender, e);
                return true;
            }
            return base.ProcessCmdKey(ref msg, keyData);
        }

 void Form1_KeyDown(object sender, KeyEventArgs e)
        {


            MessageBox.Show(e.KeyCode.ToString());
            if (e.KeyCode == Keys.Tab)
            {

                MessageBox.Show("OH!");
                }

        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (keyData == Keys.Tab)
            {
                object sender = Control.FromHandle(msg.HWnd);
                KeyEventArgs e = new KeyEventArgs(keyData);
                Form1_KeyDown(sender, e);
                return true;
            }
            return base.ProcessCmdKey(ref msg, keyData);
        }