public static extern uint mmioCreateChunk(IntPtr hmmio, ref MMCKINFO pmmcki, uint fuCreate);
public static extern uint mmioAscend(IntPtr hmmio, ref MMCKINFO pmmcki, uint fuAscend);
public static extern uint mmioDescend(IntPtr hmmio, ref MMCKINFO pmmcki, IntPtr pmmckiParent, uint fuDescend);