/// The CreateILockBytesOnHGlobal function creates a byte array object,

    /// ILockBytes interface.

    /// be allocated with a size of zero. If hGlobal is NULL, CreateILockBytesOnHGlobal

    /// <param name="ppLkbyt">The address of ILockBytes pointer variable that receives the

    public extern static int CreateILockBytesOnHGlobal(IntPtr hGlobal, [MarshalAs(UnmanagedType.Bool)] bool fDeleteOnRelease, out ILockBytes ppLkbyt);

    EntryPoint="CreateILockBytesOnHGlobal",

static extern int CreateILockBytesOnHGlobal(IntPtr /* HGLOBAL */ hGlobal, bool fDeleteOnRelease, [MarshalAs(UnmanagedType.Interface)]out object /* ILockBytes** */ ppLkbyt);

    Public Shared Function CreateILockBytesOnHGlobal(ByVal hGlobal As IntPtr, _

                              <Out()> ByRef ppLkbyt As IlockBytes) _

Dim lockbytes As IlockBytes = Nothing

hr = Win32.CreateILockBytesOnHGlobal(IntPtr.Zero, True, lockbytes)

    /// The GetHGlobalFromILockBytes function retrieves a global memory handle to a

    /// byte array object created using the CreateILockBytesOnHGlobal function.

    /// <param name="pLkbyt">Pointer to the ILockBytes interface on the byte-array

    /// object previously created by a call to the CreateILockBytesOnHGlobal function.</param>

    static extern int GetHGlobalFromILockBytes(ILockBytes pLkbyt, out IntPtr phglobal);

     EntryPoint="GetHGlobalFromILockBytes",

static extern int GetHGlobalFromILockBytes([MarshalAs(UnmanagedType.Interface)] object /* ILockBytes* */pLkbyt, out IntPtr /* HGLOBAL* */ phglobal);

    /// The StgCreateDocfileOnILockBytes function creates and opens a new compound file

    /// <param name="plkbyt">A pointer to the ILockBytes interface on the underlying byte-array object on which to create a compound file.</param>

    public extern static int StgCreateDocfileOnILockBytes(ILockBytes plkbyt, StgmConstants grfMode, int reserved, out IStorage ppstgOpen);

    /// The StgCreateDocfileOnILockBytes function creates and opens a new compound file

    /// <param name="plkbyt">A pointer to the ILockBytes interface on the underlying byte-array object on which to create a compound file.</param>

    public extern static int StgCreateDocfileOnILockBytes(ILockBytes plkbyt, int grfMode, int reserved, out IStorage ppstgOpen);

public interface ILockBytes

public interface ILockBytes

Public Interface IlockBytes

// read a chunk from the ILockBytes object

    ((ILockBytes)comPtr).ReadAt(offset, pv, bufferSize, out cbRead);