Bloqueo y suspensión del Pocket PC por codigo

public class BloquearPDA
{
#region DLL’s
[DllImport("Coredll.dll", EntryPoint = "FindWindow")]
private static extern System.IntPtr FindWindow(string lpClassName, string lpWindowName);

[DllImport("coredll.dll", EntryPoint = "EnableWindow")]
private static extern bool EnableWindow(IntPtr hWnd, bool value);

[DllImport("gx.dll", EntryPoint = "#9")]
public static extern int GXOpenInput();

[DllImport("gx.dll", EntryPoint = "#3")]
public static extern int GXCloseInput();

[DllImport("coredll.dll")]
private static extern void GwesPowerOffSystem();
#endregion

public static void BloqueaBarraInicio()
{
IntPtr taskBarHandle;
taskBarHandle = FindWindow("HHTaskBar", "");
EnableWindow(taskBarHandle, false);
}

public static void DesbloquearBarraInicio()
{
IntPtr taskBarHandle;
taskBarHandle = FindWindow("HHTaskBar", "");
EnableWindow(taskBarHandle, true);
}

public static void BloquearTeclasPDA()
{
GXOpenInput();
}

public static void DesbloquearTeclasPDA()
{
GXCloseInput();
}

public static void SuspenderPDA()
{
GwesPowerOffSystem();
}
}