private static void StartOnScreenKeyboard()
{
    const string OskExe = "osk.exe";
    var winDir = Environment.GetEnvironmentVariable("WINDIR");
 
    if (string.IsNullOrEmpty(winDir))
    {
        return;
    }
 
    var oskPath = Path.Combine(
        Path.Combine(winDir, "sysnative"), OskExe);
 
    if (!File.Exists(oskPath))
    {
        oskPath = Path.Combine(
            Path.Combine(winDir, "system32"), 
            OskExe);
    }
 
    if (!File.Exists(oskPath))
    {
        return;
    }
 
    Process.Start(oskPath);
}