internal extern static int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, PropertyMode mode, string text, int text_length);

 public extern static int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, PropertyMode mode, IntPtr[] data, int nelements);

		internal extern static int _XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, PropertyMode mode, uint[] data, int nelements);

 internal static extern int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, PropertyMode mode, ref IntPtr value, int nelements);

		internal extern static int XChangeProperty (IntPtr display, IntPtr window, int property, int format, int type, PropertyMode  mode, uint[] atoms, int nelements);

 public static int XChangeProperty(IntPtr display, IntPtr window, IntPtr property, IntPtr type, int format, PropertyMode mode, ref int value, int nelements);

 public void SetProperty(CameraProperty prop, int val, PropertyMode flags)
 {
     addLog("SetProperty...");
     if (cam == null)
     {
         addLog("SetProperty no cam!");
         return;
     }
     switch (prop)
     {
         case CameraProperty.Illumination:
             if (cam.Features.Torch.Available)
                 cam.Features.Torch.CurrentValue = cam.Features.Torch.MaxValue;
             break;
         case CameraProperty.ColorEnable:
             break;
     }
     addLog("SetProperty done");
 }