using System;
using System.Runtime.InteropServices;
namespace StgOpen
{
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class Class1
    {

        public enum STGM:int
        {
            DIRECT= 0X00000000,TRANSACTED=0X00010000,READ=0X00000000}
    
    

        [ComImport]
            [Guid("0000000b-0000-0000-C000-000000000046")]
            [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
            public interface IPropertyStorage
        {
            void CreateStream(
                /* [string][in] */ string pwcsName,
                /* [in] */ uint grfMode,
                /* [in] */ uint reserved1,
                /* [in] */ uint reserved2,
                /* [out] */ out IStream ppstm);

            void OpenStream(
                /* [string][in] */ string pwcsName,
                /* [unique][in] */ IntPtr reserved1,
                /* [in] */ uint grfMode,
                /* [in] */ uint reserved2,
                /* [out] */ out IStream ppstm);

            void CreateStorage(
                /* [string][in] */ string pwcsName,
                /* [in] */ uint grfMode,
                /* [in] */ uint reserved1,
                /* [in] */ uint reserved2,
                /* [out] */ out IStorage ppstg);

            void OpenStorage(
                /* [string][unique][in] */ string pwcsName,
                /* [unique][in] */ IStorage pstgPriority,
                /* [in] */ uint grfMode,
                /* [unique][in] */ IntPtr snbExclude,
                /* [in] */ uint reserved,
                /* [out] */ out IStorage ppstg);

            void CopyTo(
                /* [in] */ uint ciidExclude,
                /* [size_is][unique][in] */ Guid rgiidExclude, // should this be an array?
                /* [unique][in] */ IntPtr snbExclude,
                /* [unique][in] */ IStorage pstgDest);

            void MoveElementTo(
                /* [string][in] */ string pwcsName,
                /* [unique][in] */ IStorage pstgDest,
                /* [string][in] */ string pwcsNewName,
                /* [in] */ uint grfFlags);

            void Commit(
                /* [in] */ uint grfCommitFlags);

            void Revert();

            void EnumElements(
                /* [in] */ uint reserved1,
                /* [size_is][unique][in] */ IntPtr reserved2,
                /* [in] */ uint reserved3,
                /* [out] */ out IEnumSTATSTG ppenum);

            void DestroyElement(
                /* [string][in] */ string pwcsName);

            void RenameElement(
                /* [string][in] */ string pwcsOldName,
                /* [string][in] */ string pwcsNewName);

            void SetElementTimes(
                /* [string][unique][in] */ string pwcsName,
                /* [unique][in] */ FILETIME pctime,
                /* [unique][in] */ FILETIME patime,
                /* [unique][in] */ FILETIME pmtime);

            void SetClass(
                /* [in] */ Guid clsid);

            void SetStateBits(
                /* [in] */ uint grfStateBits,
                /* [in] */ uint grfMask);

            void Stat(
                /* [out] */ out STATSTG pstatstg,
                /* [in] */ uint grfStatFlag);

    
        }
        
        [StructLayout(LayoutKind.Sequential)]
            public struct STGOPTIONS
        {  
            [FieldOffset(0)] ushort usVersion;
            [FieldOffset(2)] ushort reserved;
            [FieldOffset(4)] uint uiSectorSize;
            [FieldOffset(8),MarshalAs(UnmanagedType.LPWStr)]string pwcsname;
        }


        [DllImport("ole32.dll")]
        public static extern int StgOpenStorageEx([MarshalAs(UnmanangedType.lPWStr)]
            string pwcsname,int grfMode,int stgfmt,int grfAttrs,ref STGOPTIONS pStgOptions,
            IntPtr reserved2,[In] ref Guid riid,[MarshalAs(UnmanangedType.IUnknown)] out object ppobjectOpen);
    }
    [STAThread]
    public static void Main(string[] args)
{
            


    string file=@"E:\\Miss_Hacker.doc";
    int result=StgOpenStorageEx(file,STGM.READ,STGFMT.DOCFILE,2,null,IntPtr.zero,ref IID_IPropertyStorage,out object ppObjectOpen);
    Console.WriteLine("{0}",result);
}
}