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FileDialogsCOMClasses.cs

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Toto je zdrojový kód souboru FileDialogsCOMClasses.cs

Helper P/Invoke Vista API COM interface interop for Common Dialogs. 

using System;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices.ComTypes;

namespace IMP.Windows.Interop
{
    #region HRESULT, PropertyKey
    /// <summary>
    /// HRESULT Wrapper
    /// This is intended for Library Internal use only.
    /// </summary>
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "HRESULT"), System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1028:EnumStorageShouldBeInt32",
        Justification = "The base type for all of these value is uint")]
    internal enum HRESULT : uint
    {
        /// <summary>
        /// S_FALSE
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "FALSE")]
        S_FALSE = 0x0001,

        /// <summary>
        /// S_OK
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "OK")]
        S_OK = 0x0000,

        /// <summary>
        /// E_INVALIDARG
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "INVALIDARG")]
        E_INVALIDARG = 0x80070057,

        /// <summary>
        /// E_OUTOFMEMORY
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "OUTOFMEMORY")]
        E_OUTOFMEMORY = 0x8007000E,

        /// <summary>
        /// E_NOINTERFACE
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "NOINTERFACE")]
        E_NOINTERFACE = 0x80004002,

        /// <summary>
        /// E_FAIL
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "FAIL")]
        E_FAIL = 0x80004005,

        /// <summary>
        /// E_ELEMENTNOTFOUND
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "ELEMENTNOTFOUND")]
        E_ELEMENTNOTFOUND = 0x80070490,

        /// <summary>
        /// TYPE_E_ELEMENTNOTFOUND
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "TYPE")]
        TYPE_E_ELEMENTNOTFOUND = 0x8002802B,


        /// <summary>
        /// NO_OBJECT
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "NO_OBJECT")]
        NO_OBJECT = 0x800401E5,

        /// <summary>
        /// Win32 Error code: ERROR_CANCELLED
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "ERROR")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "CANCELLED")]
        ERROR_CANCELLED = 1223,

        /// <summary>
        /// ERROR_CANCELLED
        /// </summary>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1707:IdentifiersShouldNotContainUnderscores")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "ERROR")]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "CANCELLED")]
        E_ERROR_CANCELLED = 0x800704C7,

        /// <summary>
        /// The requested resource is in use
        /// </summary>
        RESOURCE_IN_USE = 0x800700AA,
    }

    [StructLayout(LayoutKind.Sequential, Pack = 4)]
    internal struct PropertyKey
    {
        internal Guid fmtid;
        internal uint pid;
    }
    #endregion

    #region IModalWindow, IShellItem, IShellItemArray, IShellFolder
    [ComImport(),
    Guid("B4DB1657-70D7-485E-8E3E-6FCB5A5C1802"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IModalWindow
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime),
        PreserveSig]
        int Show([In] IntPtr parent);
    }

    [ComImport,
    Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IShellItem
    {
        // Not supported: IBindCtx
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void BindToHandler([In, MarshalAs(UnmanagedType.Interface)] IntPtr pbc, [In] ref Guid bhid, [In] ref Guid riid, out IntPtr ppv);

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

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetDisplayName([In] CommonDialogNativeMethods.SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetAttributes([In] uint sfgaoMask, out uint psfgaoAttribs);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void Compare([In, MarshalAs(UnmanagedType.Interface)] IShellItem psi, [In] uint hint, out int piOrder);
    }

    [ComImport,
    Guid("B63EA76D-1F85-456F-A19C-48159EFA858B"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IShellItemArray
    {
        // Not supported: IBindCtx.
        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT BindToHandler(
            [In, MarshalAs(UnmanagedType.Interface)] IntPtr pbc,
            [In] ref Guid rbhid,
            [In] ref Guid riid,
            out IntPtr ppvOut);

        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT GetPropertyStore(
            [In] int Flags,
            [In] ref Guid riid,
            out IntPtr ppv);

        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT GetPropertyDescriptionList(
            [In] ref PropertyKey keyType,
            [In] ref Guid riid,
            out IntPtr ppv);

        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT GetAttributes(
            [In] CommonDialogNativeMethods.SIATTRIBFLAGS dwAttribFlags,
            [In] CommonDialogNativeMethods.SFGAO sfgaoMask,
            out CommonDialogNativeMethods.SFGAO psfgaoAttribs);

        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT GetCount(out uint pdwNumItems);

        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT GetItemAt(
            [In] uint dwIndex,
            [MarshalAs(UnmanagedType.Interface)] out IShellItem ppsi);

        // Not supported: IEnumShellItems (will use GetCount and GetItemAt instead).
        [PreserveSig]
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        HRESULT EnumItems([MarshalAs(UnmanagedType.Interface)] out IntPtr ppenumShellItems);
    }
    #endregion

    #region IFileDialog, IFileDialogEvents
    [ComImport(),
    Guid("42F85136-DB7E-439C-85F1-E4075D135FC8"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IFileDialog : IModalWindow
    {
        // Defined on IModalWindow - repeated here due to requirements of COM interop layer.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime),
        PreserveSig]
        new int Show([In] IntPtr parent);

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

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetFileTypeIndex([In] uint iFileType);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetFileTypeIndex(out uint piFileType);

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

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void Unadvise([In] uint dwCookie);

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

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

    [ComImport,
    Guid("973510DB-7D7F-452B-8975-74A85828D354"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal 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);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime),
        PreserveSig]
        HRESULT OnFolderChanging(
            [In, MarshalAs(UnmanagedType.Interface)] IFileDialog pfd,
            [In, MarshalAs(UnmanagedType.Interface)] IShellItem psiFolder);

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

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

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

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

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

    #region IFileOpenDialog
    [ComImport(),
    Guid("D57C7288-D4AD-4768-BE02-9D969532D960"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IFileOpenDialog : IFileDialog
    {
        // Defined on IModalWindow - repeated here due to requirements of COM interop layer.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime),
        PreserveSig]
        new int Show([In] IntPtr parent);

        // Defined on IFileDialog - repeated here due to requirements of COM interop layer.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetFileTypes([In] uint cFileTypes, [In] ref CommonDialogNativeMethods.COMDLG_FILTERSPEC rgFilterSpec);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void SetFileTypeIndex([In] uint iFileType);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void GetFileTypeIndex(out uint piFileType);

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

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void Unadvise([In] uint dwCookie);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        // Defined by IFileOpenDialog.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetResults([MarshalAs(UnmanagedType.Interface)] out IShellItemArray ppenum);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetSelectedItems([MarshalAs(UnmanagedType.Interface)] out IShellItemArray ppsai);
    }
    #endregion

    #region IFileSaveDialog
    [ComImport(),
    Guid("84BCCD23-5FDE-4CDB-AEA4-AF64B83D78AB"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IFileSaveDialog : IFileDialog
    {
        // Defined on IModalWindow - repeated here due to requirements of COM interop layer.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime),
        PreserveSig]
        new int Show([In] IntPtr parent);

        // Defined on IFileDialog - repeated here due to requirements of COM interop layer.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetFileTypes(
            [In] uint cFileTypes,
            [In] ref CommonDialogNativeMethods.COMDLG_FILTERSPEC rgFilterSpec);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void SetFileTypeIndex([In] uint iFileType);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void GetFileTypeIndex(out uint piFileType);

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

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        new void Unadvise([In] uint dwCookie);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        // Defined by IFileSaveDialog interface.

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

        // Not currently supported: IPropertyStore
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetProperties([In, MarshalAs(UnmanagedType.Interface)] IntPtr pStore);

        // Not currently supported: IPropertyDescriptionList
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetCollectedProperties([In, MarshalAs(UnmanagedType.Interface)] IntPtr pList, [In] int fAppendDefault);

        // Not currently supported: IPropertyStore
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void GetProperties([MarshalAs(UnmanagedType.Interface)] out IntPtr ppStore);

        // Not currently supported: IPropertyStore, IFileOperationProgressSink.
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void ApplyProperties(
            [In, MarshalAs(UnmanagedType.Interface)] IShellItem psi,
            [In, MarshalAs(UnmanagedType.Interface)] IntPtr pStore,
            [In, ComAliasName("ShellObjects.wireHWND")] ref IntPtr hwnd,
            [In, MarshalAs(UnmanagedType.Interface)] IntPtr pSink);
    }
    #endregion

    [ComImport,
    Guid("D57C7288-D4AD-4768-BE02-9D969532D960"),
    CoClass(typeof(FileOpenDialogRCW))]
    internal interface NativeFileOpenDialog : IFileOpenDialog
    {
    }

    [ComImport,
    Guid("84BCCD23-5FDE-4CDB-AEA4-AF64B83D78AB"),
    CoClass(typeof(FileSaveDialogRCW))]
    internal interface NativeFileSaveDialog : IFileSaveDialog
    {
    }

    // .NET classes representing runtime callable wrappers.
    [ComImport,
    ClassInterface(ClassInterfaceType.None),
    TypeLibType(TypeLibTypeFlags.FCanCreate),
    Guid("DC1C5A9C-E88A-4DDE-A5A1-60F82A20AEF7")]
    internal class FileOpenDialogRCW
    {
    }

    [ComImport,
    ClassInterface(ClassInterfaceType.None),
    TypeLibType(TypeLibTypeFlags.FCanCreate),
    Guid("C0B4E2F3-BA21-4773-8DBA-335EC946EB8B")]
    internal class FileSaveDialogRCW
    {
    }
}