private const int UOI_HEAPSIZE = 5; //Windows Server 2003 and Windows XP/2000:  This value is not supported.

        ulong heapsize;

        if (GetUserObjectInformation(hdesk, UOI_HEAPSIZE, out heapsize, sizeof(ulong), out lengthNeeded))

            Text = "Heapsize:" + heapsize;