IUrlHistoryStg2 :: ClearHistory（）不适用于服务？

IUrlHistoryStg2 :: ClearHistory（）方法记录为每个用户。IUrlHistoryStg2 :: ClearHistory（）不适用于服务？

http://msdn.microsoft.com/en-us/library/aa767715(VS.85).aspx

当从SYSTEM帐户下运行的服务调用它，我无法针对特定登录的用户。我已经通过WindowsIdentity.Impersonate（）成功地模拟了用户，但对ClearHistory（）的调用始终返回0，但不会清除用户的历史记录。

这适用于XP和Win7，因此看起来不是会话隔离问题。

也许因为它是COM，当模仿时，有些东西正在查看调用者的Process标记而不是它的Thread标记？

我很困惑，为什么冒充用户不会简单地导致这种方法的成功？

using System; 
using System.Runtime.InteropServices; 

/** 
* wrapper for IUrlHistory 
*/ 
public struct STATURL 
{ 
    public static uint SIZEOF_STATURL = (uint)Marshal.SizeOf(typeof(STATURL)); 
    public uint cbSize; 
    [MarshalAs(UnmanagedType.LPWStr)] public string pwcsUrl; 
    [MarshalAs(UnmanagedType.LPWStr)] public string pwcsTitle; 
    public System.Runtime.InteropServices.ComTypes.FILETIME 
       ftLastVisited, 
       ftLastUpdated, 
       ftExpires; 
    public uint dwFlags; 
} 

[ComImport, Guid("3C374A42-BAE4-11CF-BF7D-00AA006946EE"), 
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IEnumSTATURL 
{ 
    [PreserveSig] 
    uint Next(uint celt, out STATURL rgelt, out uint pceltFetched); 
    void Skip(uint celt); 
    void Reset(); 
    void Clone(out IEnumSTATURL ppenum); 
    void SetFilter(
     [MarshalAs(UnmanagedType.LPWStr)] string poszFilter, 
     uint dwFlags); 
} 

[ComImport, Guid("AFA0DC11-C313-11d0-831A-00C04FD5AE38"), 
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
public interface IUrlHistoryStg2 
{ 
    #region IUrlHistoryStg methods 
    void AddUrl(
     [MarshalAs(UnmanagedType.LPWStr)] string pocsUrl, 
     [MarshalAs(UnmanagedType.LPWStr)] string pocsTitle, 
     uint dwFlags); 

    void DeleteUrl(
     [MarshalAs(UnmanagedType.LPWStr)] string pocsUrl, 
     uint dwFlags); 

    void QueryUrl(
     [MarshalAs(UnmanagedType.LPWStr)] string pocsUrl, 
     uint dwFlags, 
     ref STATURL lpSTATURL); 

    void BindToObject(
     [MarshalAs(UnmanagedType.LPWStr)] string pocsUrl, 
     ref Guid riid, 
     [MarshalAs(UnmanagedType.IUnknown)] out object ppvOut); 

    IEnumSTATURL EnumUrls(); 

    #endregion 

    void AddUrlAndNotify(
     [MarshalAs(UnmanagedType.LPWStr)] string pocsUrl, 
     [MarshalAs(UnmanagedType.LPWStr)] string pocsTitle, 
     uint dwFlags, 
     [MarshalAs(UnmanagedType.Bool)] bool fWriteHistory, 
     [MarshalAs(UnmanagedType.IUnknown)] object /*IOleCommandTarget*/ 
     poctNotify, 
     [MarshalAs(UnmanagedType.IUnknown)] object punkISFolder); 

    void ClearHistory(); 
} 

[ComImport, Guid("3C374A40-BAE4-11CF-BF7D-00AA006946EE")] 
public class UrlHistory /* : IUrlHistoryStg[2] */ {} 


public class test 
{ 
    static void Main() 
    { 
     IUrlHistoryStg2 stg = (IUrlHistoryStg2) new UrlHistory(); 
     stg.ClearHistory(); 
    } 
}

来源

2010-11-29 Peter350