Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / interop / NativeStructs.cs / 1471291 / NativeStructs.cs
/**************************************************************************\ Copyright Microsoft Corporation. All Rights Reserved. \**************************************************************************/ // // A consolidated file of native structures exposed for interop. // These may be structs or classes, depending on the calling requirements // // The naming should generally match the native counterparts. // The structures may be slightly thicker wrappers to make them // easier to consume correctly from .Net code (e.g. hiding resource management) // namespace MS.Internal.Interop { using System; using System.IO; using System.Runtime.InteropServices; using System.Runtime.InteropServices.ComTypes; using System.Security; // Some COM interfaces and Win32 structures are already declared in the framework. // Interesting ones to remember in System.Runtime.InteropServices.ComTypes are: using FILETIME = System.Runtime.InteropServices.ComTypes.FILETIME; using IPersistFile = System.Runtime.InteropServices.ComTypes.IPersistFile; using IStream = System.Runtime.InteropServices.ComTypes.IStream; ////// This class is not safe to use in partial trust. /// Critical: This class is a wrapper for a native structure that manages its own resources. /// [SecurityCritical] [StructLayout(LayoutKind.Explicit)] internal class PROPVARIANT : IDisposable { private static class NativeMethods { ////// Critical: Suppresses unmanaged code security. /// [SecurityCritical, SuppressUnmanagedCodeSecurity] [DllImport(MS.Win32.ExternDll.Ole32)] internal static extern int PropVariantClear(PROPVARIANT pvar); } [FieldOffset(0)] private ushort vt; [FieldOffset(8)] private IntPtr pointerVal; [FieldOffset(8)] private byte byteVal; [FieldOffset(8)] private long longVal; [FieldOffset(8)] private short boolVal; ////// /// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// public VarEnum VarType { [SecurityCritical, SecurityTreatAsSafe] get { return (VarEnum)vt; } } // Right now only using this for strings. If for some reason we get something else return null. ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] public string GetValue() { if (vt == (ushort)VarEnum.VT_LPWSTR) { return Marshal.PtrToStringUni(pointerVal); } return null; } ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] public void SetValue(bool f) { Clear(); vt = (ushort)VarEnum.VT_BOOL; boolVal = (short)(f ? -1 : 0); } ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] public void SetValue(string val) { Clear(); vt = (ushort)VarEnum.VT_LPWSTR; pointerVal = Marshal.StringToCoTaskMemUni(val); } ////// Critical - Calls critical PropVariantClear /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] public void Clear() { NativeMethods.PropVariantClear(this); } #region IDisposable Pattern ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] ~PROPVARIANT() { Dispose(false); } ////// Critical: This class is tagged Critical /// TreatAsSafe - This class is only available in full trust. /// [SecurityCritical, SecurityTreatAsSafe] private void Dispose(bool disposing) { Clear(); } #endregion } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] [BestFitMapping(false)] internal class WIN32_FIND_DATAW { public FileAttributes dwFileAttributes; public FILETIME ftCreationTime; public FILETIME ftLastAccessTime; public FILETIME ftLastWriteTime; public int nFileSizeHigh; public int nFileSizeLow; public int dwReserved0; public int dwReserved1; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)] public string cFileName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)] public string cAlternateFileName; } // New to Win7. [StructLayout(LayoutKind.Sequential)] internal struct CHANGEFILTERSTRUCT { public uint cbSize; public MSGFLTINFO ExtStatus; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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