C# Definition:

[ComImport, Guid ( "973510DB-7D7F-452B-8975-74A85828D354" ), InterfaceType ( ComInterfaceType.InterfaceIsIUnknown )]
interface IFileDialogEvents
{
    // NOTE: some of these callbacks are cancelable - returning S_FALSE means that
    // the dialog should not proceed (e.g. with closing, changing folder); to
    // support this, we need to use the PreserveSig attribute to enable us to return
    // the proper HRESULT
    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime ), PreserveSig]
    HRESULT OnFileOk ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd );

[ComImport, Guid ( "42f85136-db7e-439c-85f1-e4075d135fc8" ), InterfaceType ( ComInterfaceType.InterfaceIsIUnknown )]
interface IFileDialog : IModalWindow
{
    // Defined on IModalWindow - repeated here due to requirements of COM interop layer
    // --------------------------------------------------------------------------------
    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime ), PreserveSig]
    HRESULT OnFolderChanging ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd,
                   [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psiFolder );
    int Show ( [In] IntPtr parent );

    // IFileDialog-Specific interface members
    // --------------------------------------------------------------------------------
    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void OnFolderChange ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd );
    void SetFileTypes ( [In] uint cFileTypes,
                [In, MarshalAs ( UnmanagedType.LPArray )] COMDLG_FILTERSPEC[] rgFilterSpec );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void OnSelectionChange ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd );
    void SetFileTypeIndex ( [In] uint iFileType );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void OnShareViolation ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd,
                [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psi,
                out FDE_SHAREVIOLATION_RESPONSE pResponse );
    void GetFileTypeIndex ( out uint piFileType );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void OnTypeChange ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd );
    void Advise ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialogEvents pfde, out uint pdwCookie );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void OnOverwrite ( [In, MarshalAs ( UnmanagedType.Interface )] IFileDialog pfd,
               [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psi,
               out FDE_OVERWRITE_RESPONSE pResponse );
}
    void Unadvise ( [In] uint dwCookie );

VB Definition:

<ComImport> _
<Guid("TODO")> _
'TODO: Insert <InterfaceType(ComInterfaceType.InterfaceIsIUnknown)> _ if this doesn't derive from IDispatch
Interface IFileDialogEvents
   TODO
End Interface

User-Defined Types:

None.

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetOptions ( [In] FOS fos );

Notes:

None.

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void GetOptions ( out FOS pfos );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetDefaultFolder ( [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psi );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetFolder ( [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psi );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void GetFolder ( [MarshalAs ( UnmanagedType.Interface )] out IShellItem ppsi );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void GetCurrentSelection ( [MarshalAs ( UnmanagedType.Interface )] out IShellItem ppsi );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetFileName ( [In, MarshalAs ( UnmanagedType.LPWStr )] string pszName );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void GetFileName ( [MarshalAs ( UnmanagedType.LPWStr )] out string pszName );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetTitle ( [In, MarshalAs ( UnmanagedType.LPWStr )] string pszTitle );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetOkButtonLabel ( [In, MarshalAs ( UnmanagedType.LPWStr )] string pszText );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetFileNameLabel ( [In, MarshalAs ( UnmanagedType.LPWStr )] string pszLabel );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void GetResult ( [MarshalAs ( UnmanagedType.Interface )] out IShellItem ppsi );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void AddPlace ( [In, MarshalAs ( UnmanagedType.Interface )] IShellItem psi, NativeMethods.FDAP fdap );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetDefaultExtension ( [In, MarshalAs ( UnmanagedType.LPWStr )] string pszDefaultExtension );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void Close ( [MarshalAs ( UnmanagedType.Error )] int hr );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetClientGuid ( [In] ref Guid guid );

    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void ClearClientData ( );

    // Not supported:  IShellItemFilter is not defined, converting to IntPtr
    [MethodImpl ( MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime )]
    void SetFilter ( [MarshalAs ( UnmanagedType.Interface )] IntPtr pFilter );
    }
}

VB Definition:

<ComImport> _
<Guid("TODO")> _
'TODO: Insert <InterfaceType(ComInterfaceType.InterfaceIsIUnknown)> _ if this doesn't derive from IDispatch
Interface IFileDialog
   TODO
End Interface

User-Defined Types:

None.

Notes:

None.

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