public void OpenTabTip()
{
    bool bt = true;
    Process[] processes = Process.GetProcesses();
    foreach (Process p in processes)
    {
        //if (p.ProcessName.ToLower() == "osk")
        if (p.ProcessName.ToLower() == "tabtip")
        {
            p.Kill(); p.Close();
            //bt = false;
        }
    }
    if (bt)
    {
        System.Diagnostics.Process.Start("TabTip.exe");
    }
}