namespace OPCDA.Interface
{
    using System;
    using System.Runtime.InteropServices;

    [ComImport, Guid("39c13a70-011e-11d0-9675-0020afd8adb3"), ComVisible(true), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IOPCDataCallback
    {
        void OnDataChange([In] int dwTransid, [In] int hGroup, [In] int hrMasterquality, [In] int hrMastererror, [In] int dwCount, [In] IntPtr phClientItems, [In] IntPtr pvValues, [In] IntPtr pwQualities, [In] IntPtr pftTimeStamps, [In] IntPtr ppErrors);
        void OnReadComplete([In] int dwTransid, [In] int hGroup, [In] int hrMasterquality, [In] int hrMastererror, [In] int dwCount, [In] IntPtr phClientItems, [In] IntPtr pvValues, [In] IntPtr pwQualities, [In] IntPtr pftTimeStamps, [In] IntPtr ppErrors);
        void OnWriteComplete([In] int dwTransid, [In] int hGroup, [In] int hrMastererr, [In] int dwCount, [In] IntPtr pClienthandles, [In] IntPtr ppErrors);
        void OnCancelComplete([In] int dwTransid, [In] int hGroup);
    }
}