OlePropertyStructs.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Base / MS / Internal / interop / OlePropertyStructs.cs / 1 / OlePropertyStructs.cs

                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//   These structures and constants are managed equivalents to COM structures 
//   used to access OLE properties.
// 
// History:
//  01/26/2004: BruceMac: Initial implementation.
//  08/26/2004: JohnLarc: Moved to internal namespace MS.Internal.Interop.
//  06/23/2005: LGolding: Split out from IndexingFilter.cs, because these 
//                  structs are now needed by both the EncryptedPackageCoreProperties
//                  class in WindowsBase and the IFilterCode in PresentationFramework. 
// 
//-----------------------------------------------------------------------------
 
using System;
using System.Runtime.InteropServices;

using MS.Internal.WindowsBase;        // for FriendAccessAllowedAttribute 

namespace MS.Internal.Interop 
{ 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    internal struct STATPROPSTG 
    {
        [MarshalAs(UnmanagedType.LPWStr)]
        string lpwstrName;
        UInt32 propid; 
        VARTYPE vt;
    } 
 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    internal struct STATPROPSETSTG 
    {
        Guid fmtid;
        Guid clsid;
        UInt32 grfFlags; 
        System.Runtime.InteropServices.ComTypes.FILETIME mtime;
        System.Runtime.InteropServices.ComTypes.FILETIME ctime; 
        System.Runtime.InteropServices.ComTypes.FILETIME atime; 
        UInt32 dwOSVersion;
    } 

    #region PROPVARIANT

    ///  
    /// Managed view of unmanaged PROPVARIANT type
    ///  
    ///  
    /// PROPVARIANT can represent many different things.  We are only interested in strings
    /// for this version but the full range of values is listed her for completeness. 
    ///
    /// typedef unsigned short VARTYPE;
    /// typedef unsigned short WORD;
    /// typedef struct PROPVARIANT { 
    /// VARTYPE vt;  WORD wReserved1;  WORD wReserved2;  WORD wReserved3;
    /// union { 
    ///     CHAR cVal; 
    ///     UCHAR bVal;
    ///     SHORT iVal; 
    ///     USHORT uiVal;
    ///     LONG lVal;
    ///     INT intVal;
    ///     ULONG ulVal; 
    ///     UINT uintVal;
    ///     LARGE_INTEGER hVal; 
    ///     ULARGE_INTEGER uhVal; 
    ///     FLOAT fltVal;    DOUBLE dblVal;    CY cyVal;    DATE date;
    ///     BSTR bstrVal;    VARIANT_BOOL boolVal;    SCODE scode; 
    ///     FILETIME filetime;    LPSTR pszVal;    LPWSTR pwszVal;
    ///     CLSID* puuid;    CLIPDATA* pclipdata;    BLOB blob;
    ///     IStream* pStream;    IStorage* pStorage;    IUnknown* punkVal;
    ///     IDispatch* pdispVal;    LPSAFEARRAY parray;    CAC cac; 
    ///     CAUB caub;    CAI cai;    CAUI caui;    CAL cal;    CAUL caul;
    ///     CAH cah;    CAUH cauh;    CAFLT caflt;    CADBL cadbl; 
    ///     CACY cacy;    CADATE cadate;    CABSTR cabstr; 
    ///     CABOOL cabool;    CASCODE cascode;    CALPSTR calpstr;
    ///     CALPWSTR calpwstr;    CAFILETIME cafiletime;    CACLSID cauuid; 
    ///     CACLIPDATA caclipdata;    CAPROPVARIANT capropvar;
    ///     CHAR* pcVal;    UCHAR* pbVal;    SHORT* piVal;    USHORT* puiVal;
    ///     LONG* plVal;    ULONG* pulVal;    INT* pintVal;    UINT* puintVal;
    ///     FLOAT* pfltVal;    DOUBLE* pdblVal;    VARIANT_BOOL* pboolVal; 
    ///     DECIMAL* pdecVal;    SCODE* pscode;    CY* pcyVal;
    ///     PROPVARIANT* pvarVal; 
    /// }; 
    /// } PROPVARIANT;
    ///  
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed]
    internal struct PROPVARIANT
    { 
        /// 
        /// Variant type 
        ///  
        internal VARTYPE          vt;
 
        /// 
        /// unused
        /// 
        internal ushort wReserved1; 

        ///  
        /// unused 
        /// 
        internal ushort wReserved2; 

        /// 
        /// unused
        ///  
        internal ushort wReserved3;
 
        ///  
        /// union where the actual variant value lives
        ///  
        internal PropVariantUnion union;
    }

    ///  
    /// enumeration for all legal types of a PROPVARIANT
    ///  
    /// add definitions as needed 
    [FriendAccessAllowed]
    internal enum VARTYPE : short 
    {
        /// 
        /// BSTR
        ///  
        VT_BSTR = 8,        // BSTR allocated using SysAllocString
 
        ///  
        /// LPSTR
        ///  
        VT_LPSTR = 30,

        /// 
        /// FILETIME 
        /// 
        VT_FILETIME = 64, 
    } 

    ///  
    /// Union portion of PROPVARIANT
    /// 
    /// 
    /// All fields (or their placeholders) are declared even if 
    /// they are not used. This is to make sure that the size of
    /// the union matches the size of the union in 
    /// the actual unmanaged PROPVARIANT structure 
    /// for all architectures (32-bit/64-bit).
    /// Points to note: 
    /// - All pointer type fields are declared as IntPtr.
    /// - CAxxx type fields (like CAC, CAUB, etc.) are all of same
    ///     structural layout, hence not all declared individually
    ///     since they are not used. A placeholder CArray 
    ///     is used to represent all of them to account for the
    ///     size of these types. CArray is defined later. 
    /// - Rest of the fields are declared with corresponding 
    ///     managed equivalent types.
    ///  
    [StructLayout(LayoutKind.Explicit)]
    [FriendAccessAllowed]
    internal struct PropVariantUnion
    { 
        /// 
        /// CHAR 
        ///  
        [FieldOffset(0)]
        internal sbyte cVal; 

        /// 
        /// UCHAR
        ///  
        [FieldOffset(0)]
        internal byte bVal; 
 
        /// 
        /// SHORT 
        /// 
        [FieldOffset(0)]
        internal short iVal;
 
        /// 
        /// USHORT 
        ///  
        [FieldOffset(0)]
        internal ushort uiVal; 

        /// 
        /// LONG
        ///  
        [FieldOffset(0)]
        internal int lVal; 
 
        /// 
        /// ULONG 
        /// 
        [FieldOffset(0)]
        internal uint ulVal;
 
        /// 
        /// INT 
        ///  
        [FieldOffset(0)]
        internal int intVal; 

        /// 
        /// UINT
        ///  
        [FieldOffset(0)]
        internal uint uintVal; 
 
        /// 
        /// LARGE_INTEGER 
        /// 
        [FieldOffset(0)]
        internal Int64 hVal;
 
        /// 
        /// ULARGE_INTEGER 
        ///  
        [FieldOffset(0)]
        internal UInt64 uhVal; 

        /// 
        /// FLOAT
        ///  
        [FieldOffset(0)]
        internal float fltVal; 
 
        /// 
        /// DOUBLE 
        /// 
        [FieldOffset(0)]
        internal double dblVal;
 
        /// 
        /// VARIANT_BOOL 
        ///  
        [FieldOffset(0)]
        internal short boolVal; 

        /// 
        /// SCODE
        ///  
        [FieldOffset(0)]
        internal int scode; 
 
        /// 
        /// CY 
        /// 
        [FieldOffset(0)]
        internal CY cyVal;
 
        /// 
        /// DATE 
        ///  
        [FieldOffset(0)]
        internal double date; 

        /// 
        /// FILETIME
        ///  
        [FieldOffset(0)]
        internal System.Runtime.InteropServices.ComTypes.FILETIME filetime; 
 

        ///  
        /// CLSID*
        /// 
        [FieldOffset(0)]
        internal IntPtr puuid; 

        ///  
        /// CLIPDATA* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pclipdata;

        /// 
        /// BSTR 
        /// 
        [FieldOffset(0)] 
        internal IntPtr bstrVal; 

        ///  
        /// BSTRBLOB
        /// 
        [FieldOffset(0)]
        internal BSTRBLOB bstrblobVal; 

        ///  
        /// BLOB 
        /// 
        [FieldOffset(0)] 
        internal BLOB blob;

        /// 
        /// LPSTR 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pszVal; 

        ///  
        /// LPWSTR
        /// 
        [FieldOffset(0)]
        internal IntPtr pwszVal; 

        ///  
        /// IUnknown* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr punkVal;

        /// 
        /// IDispatch* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdispVal; 

        ///  
        /// IStream*
        /// 
        [FieldOffset(0)]
        internal IntPtr pStream; 

        ///  
        /// IStorage* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pStorage;

        /// 
        /// LPVERSIONEDSTREAM 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pVersionedStream; 

        ///  
        /// LPSAFEARRAY
        /// 
        [FieldOffset(0)]
        internal IntPtr parray; 

        ///  
        /// Placeholder for 
        /// CAC, CAUB, CAI, CAUI, CAL, CAUL, CAH, CAUH; CAFLT,
        /// CADBL, CABOOL, CASCODE, CACY, CADATE, CAFILETIME, 
        /// CACLSID, CACLIPDATA, CABSTR, CABSTRBLOB,
        /// CALPSTR, CALPWSTR, CAPROPVARIANT
        /// 
        [FieldOffset(0)] 
        internal CArray cArray;
 
        ///  
        /// CHAR*
        ///  
        [FieldOffset(0)]
        internal IntPtr pcVal;

        ///  
        /// UCHAR*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pbVal;
 
        /// 
        /// SHORT*
        /// 
        [FieldOffset(0)] 
        internal IntPtr piVal;
 
        ///  
        /// USHORT*
        ///  
        [FieldOffset(0)]
        internal IntPtr puiVal;

        ///  
        /// LONG*
        ///  
        [FieldOffset(0)] 
        internal IntPtr plVal;
 
        /// 
        /// ULONG*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pulVal;
 
        ///  
        /// INT*
        ///  
        [FieldOffset(0)]
        internal IntPtr pintVal;

        ///  
        /// UINT*
        ///  
        [FieldOffset(0)] 
        internal IntPtr puintVal;
 
        /// 
        /// FLOAT*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pfltVal;
 
        ///  
        /// DOUBLE*
        ///  
        [FieldOffset(0)]
        internal IntPtr pdblVal;

        ///  
        /// VARIANT_BOOL*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pboolVal;
 
        /// 
        /// DECIMAL*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdecVal;
 
        ///  
        /// SCODE*
        ///  
        [FieldOffset(0)]
        internal IntPtr pscode;

        ///  
        /// CY*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pcyVal;
 
        /// 
        /// DATE*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdate;
 
        ///  
        /// BSTR*
        ///  
        [FieldOffset(0)]
        internal IntPtr pbstrVal;

        ///  
        /// IUnknown**
        ///  
        [FieldOffset(0)] 
        internal IntPtr ppunkVal;
 
        /// 
        /// IDispatch**
        /// 
        [FieldOffset(0)] 
        internal IntPtr ppdispVal;
 
        ///  
        /// LPSAFEARRAY*
        ///  
        [FieldOffset(0)]
        internal IntPtr pparray;

        ///  
        /// PROPVARIANT*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pvarVal;
    } 

    #region Structs used by PropVariantUnion

    // 
    // NOTE: Verifiability requires that the
    // fields of these value-types need to be public 
    // since PropVariantUnion has explicit layout, 
    // and has these value-types as its fields in a way that
    // overlaps with other PropVariantUnion fields 
    // (same FieldOffset for multiple fields).
    //

    ///  
    /// CY, used in PropVariantUnion.
    ///  
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct CY 
    {
        public uint Lo;
        public int Hi;
    } 

    ///  
    /// BSTRBLOB, used in PropVariantUnion. 
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct BSTRBLOB
    {
        public uint cbSize; 
        public IntPtr pData;
    } 
 
    /// 
    /// BLOB, used in PropVariantUnion. 
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed]
    internal struct BLOB 
    {
        public uint cbSize; 
        public IntPtr pBlobData; 
    }
 
    /// 
    /// CArray, used in PropVariantUnion.
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct CArray 
    { 
        public uint cElems;
        public IntPtr pElems; 
    }

    #endregion Structs used by PropVariantUnion
 
    #endregion PROPVARIANT
 
    #region PROPSPEC 
    /// 
    /// Selector for union 
    /// 
    [FriendAccessAllowed]
    internal enum PropSpecType : int
    { 
        /// 
        /// type is a string 
        ///  
        Name = 0,
        ///  
        /// type is a property id
        /// 
        Id = 1,
    } 

    ///  
    /// Explicitly packed union 
    /// 
    [StructLayout(LayoutKind.Explicit)] 
    [FriendAccessAllowed]
    internal struct PROPSPECunion
    {
        ///  
        /// first value of union - String
        ///  
        [FieldOffset(0)] 
        internal IntPtr name;            // kind=0
 
        /// 
        /// second value of union - ULong
        /// 
        [FieldOffset(0)] 
        internal uint propId;        // kind=1
    } 
 
    /// 
    /// PROPSPEC - needed for IFilter.Init to specify which properties to extract 
    /// 
    /// 
    /// typedef struct tagPROPSPEC
    /// { 
    ///    ULONG ulKind;
    ///    union { 
    ///         PROPID propid;          // ulKind = 1 
    ///         LPOLESTR lpwstr;        // ulKind = 0
    ///     }; 
    /// } PROPSPEC;
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed] 
    internal struct PROPSPEC
    { 
        ///  
        /// Selector value
        ///  
        internal uint propType; // ULONG in COM is UInt32 in .NET

        /// 
        /// Union struct 
        /// 
        internal PROPSPECunion union; 
    } 

    #endregion PROPSPEC 

    #region FormatId

    ///  
    /// Format identifiers.
    ///  
    [FriendAccessAllowed] 
    internal static class FormatId
    { 
        /// 
        /// Property sets.
        /// 
        ///  
        /// Can't be declared readonly since they have to passed by ref
        /// to EncryptedPackageCoreProperties.GetOleProperty, because 
        /// IPropertyStorage.ReadMultiple takes a "ref Guid" as its first argument. 
        /// 
        internal static Guid SummaryInformation = 
            new Guid("{F29F85E0-4FF9-1068-AB91-08002B27B3D9}");
        internal static Guid DocumentSummaryInformation =
            new Guid("{D5CDD502-2E9C-101B-9397-08002B2CF9AE}");
    } 

    #endregion FormatId 
 
    #region PropertyId
 
    /// 
    /// Property identifiers.
    /// 
    [FriendAccessAllowed] 
    internal static class PropertyId
    { 
        ///  
        /// Summary Information property identifiers.
        ///  
        internal const uint Title = 0x00000002;
        internal const uint Subject = 0x00000003;
        internal const uint Creator = 0x00000004;
        internal const uint Keywords = 0x00000005; 
        internal const uint Description = 0x00000006;
        internal const uint LastModifiedBy = 0x00000008; 
        internal const uint Revision = 0x00000009; 
        internal const uint LastPrinted = 0x0000000B;
        internal const uint DateCreated = 0x0000000C; 
        internal const uint DateModified = 0x0000000D;

        /// 
        /// Document Summary Information property identifiers. 
        /// 
        internal const uint Category = 0x00000002; 
        internal const uint Identifier = 0x00000012; 
        internal const uint ContentType = 0x0000001A;
        internal const uint Language = 0x0000001B; 
        internal const uint Version = 0x0000001C;
        internal const uint ContentStatus = 0x0000001D;
    }
 
    #endregion PropertyId
 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//   These structures and constants are managed equivalents to COM structures 
//   used to access OLE properties.
// 
// History:
//  01/26/2004: BruceMac: Initial implementation.
//  08/26/2004: JohnLarc: Moved to internal namespace MS.Internal.Interop.
//  06/23/2005: LGolding: Split out from IndexingFilter.cs, because these 
//                  structs are now needed by both the EncryptedPackageCoreProperties
//                  class in WindowsBase and the IFilterCode in PresentationFramework. 
// 
//-----------------------------------------------------------------------------
 
using System;
using System.Runtime.InteropServices;

using MS.Internal.WindowsBase;        // for FriendAccessAllowedAttribute 

namespace MS.Internal.Interop 
{ 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    internal struct STATPROPSTG 
    {
        [MarshalAs(UnmanagedType.LPWStr)]
        string lpwstrName;
        UInt32 propid; 
        VARTYPE vt;
    } 
 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    internal struct STATPROPSETSTG 
    {
        Guid fmtid;
        Guid clsid;
        UInt32 grfFlags; 
        System.Runtime.InteropServices.ComTypes.FILETIME mtime;
        System.Runtime.InteropServices.ComTypes.FILETIME ctime; 
        System.Runtime.InteropServices.ComTypes.FILETIME atime; 
        UInt32 dwOSVersion;
    } 

    #region PROPVARIANT

    ///  
    /// Managed view of unmanaged PROPVARIANT type
    ///  
    ///  
    /// PROPVARIANT can represent many different things.  We are only interested in strings
    /// for this version but the full range of values is listed her for completeness. 
    ///
    /// typedef unsigned short VARTYPE;
    /// typedef unsigned short WORD;
    /// typedef struct PROPVARIANT { 
    /// VARTYPE vt;  WORD wReserved1;  WORD wReserved2;  WORD wReserved3;
    /// union { 
    ///     CHAR cVal; 
    ///     UCHAR bVal;
    ///     SHORT iVal; 
    ///     USHORT uiVal;
    ///     LONG lVal;
    ///     INT intVal;
    ///     ULONG ulVal; 
    ///     UINT uintVal;
    ///     LARGE_INTEGER hVal; 
    ///     ULARGE_INTEGER uhVal; 
    ///     FLOAT fltVal;    DOUBLE dblVal;    CY cyVal;    DATE date;
    ///     BSTR bstrVal;    VARIANT_BOOL boolVal;    SCODE scode; 
    ///     FILETIME filetime;    LPSTR pszVal;    LPWSTR pwszVal;
    ///     CLSID* puuid;    CLIPDATA* pclipdata;    BLOB blob;
    ///     IStream* pStream;    IStorage* pStorage;    IUnknown* punkVal;
    ///     IDispatch* pdispVal;    LPSAFEARRAY parray;    CAC cac; 
    ///     CAUB caub;    CAI cai;    CAUI caui;    CAL cal;    CAUL caul;
    ///     CAH cah;    CAUH cauh;    CAFLT caflt;    CADBL cadbl; 
    ///     CACY cacy;    CADATE cadate;    CABSTR cabstr; 
    ///     CABOOL cabool;    CASCODE cascode;    CALPSTR calpstr;
    ///     CALPWSTR calpwstr;    CAFILETIME cafiletime;    CACLSID cauuid; 
    ///     CACLIPDATA caclipdata;    CAPROPVARIANT capropvar;
    ///     CHAR* pcVal;    UCHAR* pbVal;    SHORT* piVal;    USHORT* puiVal;
    ///     LONG* plVal;    ULONG* pulVal;    INT* pintVal;    UINT* puintVal;
    ///     FLOAT* pfltVal;    DOUBLE* pdblVal;    VARIANT_BOOL* pboolVal; 
    ///     DECIMAL* pdecVal;    SCODE* pscode;    CY* pcyVal;
    ///     PROPVARIANT* pvarVal; 
    /// }; 
    /// } PROPVARIANT;
    ///  
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed]
    internal struct PROPVARIANT
    { 
        /// 
        /// Variant type 
        ///  
        internal VARTYPE          vt;
 
        /// 
        /// unused
        /// 
        internal ushort wReserved1; 

        ///  
        /// unused 
        /// 
        internal ushort wReserved2; 

        /// 
        /// unused
        ///  
        internal ushort wReserved3;
 
        ///  
        /// union where the actual variant value lives
        ///  
        internal PropVariantUnion union;
    }

    ///  
    /// enumeration for all legal types of a PROPVARIANT
    ///  
    /// add definitions as needed 
    [FriendAccessAllowed]
    internal enum VARTYPE : short 
    {
        /// 
        /// BSTR
        ///  
        VT_BSTR = 8,        // BSTR allocated using SysAllocString
 
        ///  
        /// LPSTR
        ///  
        VT_LPSTR = 30,

        /// 
        /// FILETIME 
        /// 
        VT_FILETIME = 64, 
    } 

    ///  
    /// Union portion of PROPVARIANT
    /// 
    /// 
    /// All fields (or their placeholders) are declared even if 
    /// they are not used. This is to make sure that the size of
    /// the union matches the size of the union in 
    /// the actual unmanaged PROPVARIANT structure 
    /// for all architectures (32-bit/64-bit).
    /// Points to note: 
    /// - All pointer type fields are declared as IntPtr.
    /// - CAxxx type fields (like CAC, CAUB, etc.) are all of same
    ///     structural layout, hence not all declared individually
    ///     since they are not used. A placeholder CArray 
    ///     is used to represent all of them to account for the
    ///     size of these types. CArray is defined later. 
    /// - Rest of the fields are declared with corresponding 
    ///     managed equivalent types.
    ///  
    [StructLayout(LayoutKind.Explicit)]
    [FriendAccessAllowed]
    internal struct PropVariantUnion
    { 
        /// 
        /// CHAR 
        ///  
        [FieldOffset(0)]
        internal sbyte cVal; 

        /// 
        /// UCHAR
        ///  
        [FieldOffset(0)]
        internal byte bVal; 
 
        /// 
        /// SHORT 
        /// 
        [FieldOffset(0)]
        internal short iVal;
 
        /// 
        /// USHORT 
        ///  
        [FieldOffset(0)]
        internal ushort uiVal; 

        /// 
        /// LONG
        ///  
        [FieldOffset(0)]
        internal int lVal; 
 
        /// 
        /// ULONG 
        /// 
        [FieldOffset(0)]
        internal uint ulVal;
 
        /// 
        /// INT 
        ///  
        [FieldOffset(0)]
        internal int intVal; 

        /// 
        /// UINT
        ///  
        [FieldOffset(0)]
        internal uint uintVal; 
 
        /// 
        /// LARGE_INTEGER 
        /// 
        [FieldOffset(0)]
        internal Int64 hVal;
 
        /// 
        /// ULARGE_INTEGER 
        ///  
        [FieldOffset(0)]
        internal UInt64 uhVal; 

        /// 
        /// FLOAT
        ///  
        [FieldOffset(0)]
        internal float fltVal; 
 
        /// 
        /// DOUBLE 
        /// 
        [FieldOffset(0)]
        internal double dblVal;
 
        /// 
        /// VARIANT_BOOL 
        ///  
        [FieldOffset(0)]
        internal short boolVal; 

        /// 
        /// SCODE
        ///  
        [FieldOffset(0)]
        internal int scode; 
 
        /// 
        /// CY 
        /// 
        [FieldOffset(0)]
        internal CY cyVal;
 
        /// 
        /// DATE 
        ///  
        [FieldOffset(0)]
        internal double date; 

        /// 
        /// FILETIME
        ///  
        [FieldOffset(0)]
        internal System.Runtime.InteropServices.ComTypes.FILETIME filetime; 
 

        ///  
        /// CLSID*
        /// 
        [FieldOffset(0)]
        internal IntPtr puuid; 

        ///  
        /// CLIPDATA* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pclipdata;

        /// 
        /// BSTR 
        /// 
        [FieldOffset(0)] 
        internal IntPtr bstrVal; 

        ///  
        /// BSTRBLOB
        /// 
        [FieldOffset(0)]
        internal BSTRBLOB bstrblobVal; 

        ///  
        /// BLOB 
        /// 
        [FieldOffset(0)] 
        internal BLOB blob;

        /// 
        /// LPSTR 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pszVal; 

        ///  
        /// LPWSTR
        /// 
        [FieldOffset(0)]
        internal IntPtr pwszVal; 

        ///  
        /// IUnknown* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr punkVal;

        /// 
        /// IDispatch* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdispVal; 

        ///  
        /// IStream*
        /// 
        [FieldOffset(0)]
        internal IntPtr pStream; 

        ///  
        /// IStorage* 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pStorage;

        /// 
        /// LPVERSIONEDSTREAM 
        /// 
        [FieldOffset(0)] 
        internal IntPtr pVersionedStream; 

        ///  
        /// LPSAFEARRAY
        /// 
        [FieldOffset(0)]
        internal IntPtr parray; 

        ///  
        /// Placeholder for 
        /// CAC, CAUB, CAI, CAUI, CAL, CAUL, CAH, CAUH; CAFLT,
        /// CADBL, CABOOL, CASCODE, CACY, CADATE, CAFILETIME, 
        /// CACLSID, CACLIPDATA, CABSTR, CABSTRBLOB,
        /// CALPSTR, CALPWSTR, CAPROPVARIANT
        /// 
        [FieldOffset(0)] 
        internal CArray cArray;
 
        ///  
        /// CHAR*
        ///  
        [FieldOffset(0)]
        internal IntPtr pcVal;

        ///  
        /// UCHAR*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pbVal;
 
        /// 
        /// SHORT*
        /// 
        [FieldOffset(0)] 
        internal IntPtr piVal;
 
        ///  
        /// USHORT*
        ///  
        [FieldOffset(0)]
        internal IntPtr puiVal;

        ///  
        /// LONG*
        ///  
        [FieldOffset(0)] 
        internal IntPtr plVal;
 
        /// 
        /// ULONG*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pulVal;
 
        ///  
        /// INT*
        ///  
        [FieldOffset(0)]
        internal IntPtr pintVal;

        ///  
        /// UINT*
        ///  
        [FieldOffset(0)] 
        internal IntPtr puintVal;
 
        /// 
        /// FLOAT*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pfltVal;
 
        ///  
        /// DOUBLE*
        ///  
        [FieldOffset(0)]
        internal IntPtr pdblVal;

        ///  
        /// VARIANT_BOOL*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pboolVal;
 
        /// 
        /// DECIMAL*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdecVal;
 
        ///  
        /// SCODE*
        ///  
        [FieldOffset(0)]
        internal IntPtr pscode;

        ///  
        /// CY*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pcyVal;
 
        /// 
        /// DATE*
        /// 
        [FieldOffset(0)] 
        internal IntPtr pdate;
 
        ///  
        /// BSTR*
        ///  
        [FieldOffset(0)]
        internal IntPtr pbstrVal;

        ///  
        /// IUnknown**
        ///  
        [FieldOffset(0)] 
        internal IntPtr ppunkVal;
 
        /// 
        /// IDispatch**
        /// 
        [FieldOffset(0)] 
        internal IntPtr ppdispVal;
 
        ///  
        /// LPSAFEARRAY*
        ///  
        [FieldOffset(0)]
        internal IntPtr pparray;

        ///  
        /// PROPVARIANT*
        ///  
        [FieldOffset(0)] 
        internal IntPtr pvarVal;
    } 

    #region Structs used by PropVariantUnion

    // 
    // NOTE: Verifiability requires that the
    // fields of these value-types need to be public 
    // since PropVariantUnion has explicit layout, 
    // and has these value-types as its fields in a way that
    // overlaps with other PropVariantUnion fields 
    // (same FieldOffset for multiple fields).
    //

    ///  
    /// CY, used in PropVariantUnion.
    ///  
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct CY 
    {
        public uint Lo;
        public int Hi;
    } 

    ///  
    /// BSTRBLOB, used in PropVariantUnion. 
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct BSTRBLOB
    {
        public uint cbSize; 
        public IntPtr pData;
    } 
 
    /// 
    /// BLOB, used in PropVariantUnion. 
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed]
    internal struct BLOB 
    {
        public uint cbSize; 
        public IntPtr pBlobData; 
    }
 
    /// 
    /// CArray, used in PropVariantUnion.
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)] 
    [FriendAccessAllowed]
    internal struct CArray 
    { 
        public uint cElems;
        public IntPtr pElems; 
    }

    #endregion Structs used by PropVariantUnion
 
    #endregion PROPVARIANT
 
    #region PROPSPEC 
    /// 
    /// Selector for union 
    /// 
    [FriendAccessAllowed]
    internal enum PropSpecType : int
    { 
        /// 
        /// type is a string 
        ///  
        Name = 0,
        ///  
        /// type is a property id
        /// 
        Id = 1,
    } 

    ///  
    /// Explicitly packed union 
    /// 
    [StructLayout(LayoutKind.Explicit)] 
    [FriendAccessAllowed]
    internal struct PROPSPECunion
    {
        ///  
        /// first value of union - String
        ///  
        [FieldOffset(0)] 
        internal IntPtr name;            // kind=0
 
        /// 
        /// second value of union - ULong
        /// 
        [FieldOffset(0)] 
        internal uint propId;        // kind=1
    } 
 
    /// 
    /// PROPSPEC - needed for IFilter.Init to specify which properties to extract 
    /// 
    /// 
    /// typedef struct tagPROPSPEC
    /// { 
    ///    ULONG ulKind;
    ///    union { 
    ///         PROPID propid;          // ulKind = 1 
    ///         LPOLESTR lpwstr;        // ulKind = 0
    ///     }; 
    /// } PROPSPEC;
    /// 
    [StructLayout(LayoutKind.Sequential, Pack = 0)]
    [FriendAccessAllowed] 
    internal struct PROPSPEC
    { 
        ///  
        /// Selector value
        ///  
        internal uint propType; // ULONG in COM is UInt32 in .NET

        /// 
        /// Union struct 
        /// 
        internal PROPSPECunion union; 
    } 

    #endregion PROPSPEC 

    #region FormatId

    ///  
    /// Format identifiers.
    ///  
    [FriendAccessAllowed] 
    internal static class FormatId
    { 
        /// 
        /// Property sets.
        /// 
        ///  
        /// Can't be declared readonly since they have to passed by ref
        /// to EncryptedPackageCoreProperties.GetOleProperty, because 
        /// IPropertyStorage.ReadMultiple takes a "ref Guid" as its first argument. 
        /// 
        internal static Guid SummaryInformation = 
            new Guid("{F29F85E0-4FF9-1068-AB91-08002B27B3D9}");
        internal static Guid DocumentSummaryInformation =
            new Guid("{D5CDD502-2E9C-101B-9397-08002B2CF9AE}");
    } 

    #endregion FormatId 
 
    #region PropertyId
 
    /// 
    /// Property identifiers.
    /// 
    [FriendAccessAllowed] 
    internal static class PropertyId
    { 
        ///  
        /// Summary Information property identifiers.
        ///  
        internal const uint Title = 0x00000002;
        internal const uint Subject = 0x00000003;
        internal const uint Creator = 0x00000004;
        internal const uint Keywords = 0x00000005; 
        internal const uint Description = 0x00000006;
        internal const uint LastModifiedBy = 0x00000008; 
        internal const uint Revision = 0x00000009; 
        internal const uint LastPrinted = 0x0000000B;
        internal const uint DateCreated = 0x0000000C; 
        internal const uint DateModified = 0x0000000D;

        /// 
        /// Document Summary Information property identifiers. 
        /// 
        internal const uint Category = 0x00000002; 
        internal const uint Identifier = 0x00000012; 
        internal const uint ContentType = 0x0000001A;
        internal const uint Language = 0x0000001B; 
        internal const uint Version = 0x0000001C;
        internal const uint ContentStatus = 0x0000001D;
    }
 
    #endregion PropertyId
 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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