下面是一个用C#操作用户浏览器记录的方法，包括得到这些记录，及清空它们的方法

using System.Collections;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        IEHistory ie = new IEHistory();
        private void button1_Click(object sender, EventArgs e)
        {
            //得到记录
            string[] r = ie.GetIEHistory();
            MessageBox.Show(string.Join(',', r));
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //清空
            string r = ie.ClearIEHistory();
            MessageBox.Show(r);
        }

        /// <summary>
        /// 浏览器历史记录
        /// </summary>
        public class IEHistory
        {
            /// <summary>
            /// 清空浏览历史记录
            /// </summary>
            public string ClearIEHistory()
            {
                try
                {
                    IUrlHistoryStg2 vUrlHistoryStg2 = (IUrlHistoryStg2)new UrlHistory();
                    vUrlHistoryStg2.ClearHistory();

                    return "OK";
                }
                catch (Exception ErrMsg)
                {
                    return ErrMsg.ToString();
                }
            }
            /// <summary>
            /// 得到浏览历史记录
            /// </summary>
            /// <returns></returns>
            public string[] GetIEHistory()
            {
                ArrayList al = new ArrayList();

                IUrlHistoryStg2 vUrlHistoryStg2 = (IUrlHistoryStg2)new UrlHistory();
                IEnumSTATURL vEnumSTATURL = vUrlHistoryStg2.EnumUrls();
                STATURL vSTATURL;
                uint vFectched;
                while (vEnumSTATURL.Next(1, out vSTATURL, out vFectched) == 0)
                {
                    string src = vSTATURL.pwcsUrl;
                    al.Add(src);
                }

                return (string[])al.ToArray(typeof(string));
            }

            #region 不需要改动
            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 FILETIME ftLastVisited,
                    ftLastUpdated,
                    ftExpires;
                public uint dwFlags;
            }

            [ComImport, Guid("3C374A42-BAE4-11CF-BF7D-00AA006946EE"),
                InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
            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)]
            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")]
            class UrlHistory /* : IUrlHistoryStg[2] */ { }
            #endregion
        }
    }
}

注意：using System.Runtime.InteropServices;这个文件可能会提示下载新版本。