如何写清除IE历史记录的程序

Question

如何写清除IE历史记录的程序
是用API还是直接删除文件夹？
请给源代码

Answer 1

清除Internet Explorer临时文件 在TfrmMain你必须引用WinINet单元 Uses WinINet; 然后放上一个TButton按钮命名为btnEmptyCache，加入以下代码：  Procedure TfrmMain.btnEmptyCacheClick( Sender : TObject );
   Var
    lpEntryInfo : PInternetCacheEntryInfo;
    hCacheDir : LongWord;
    dwEntrySize : LongWord;
    dwLastError : LongWord;
   Begin
    dwEntrySize := 0;
    FindFirstUrlCacheEntry(NIL,TInternetCacheEntryInfoNIL^ ),dwEntrySize );
  GetMem( lpEntryInfo, dwEntrySize );
  hCacheDir := FindFirstUrlCacheEntry( NIL, lpEntryInfo^, 
dwEntrySize );
  If ( hCacheDir <> 0 ) Then
  DeleteUrlCacheEntry( lpEntryInfo^.lpszSourceUrlName );
  FreeMem( lpEntryInfo );
  Repeat
  dwEntrySize := 0;
  FindNextUrlCacheEntry( hCacheDir, TInternetCacheEntryInfo( 
NIL^ ), dwEntrySize );
  dwLastError := GetLastError();
  If ( GetLastError = ERROR_INSUFFICIENT_BUFFER ) Then Begin
  GetMem( lpEntryInfo, dwEntrySize );
  If ( FindNextUrlCacheEntry( hCacheDir, lpEntryInfo^, 
dwEntrySize ) ) Then
  DeleteUrlCacheEntry( lpEntryInfo^.lpszSourceUrlName );
  FreeMem(lpEntryInfo);
  End;
  Until ( dwLastError = ERROR_NO_MORE_ITEMS );  End;
*********************
type
  TSTATURL = record
    cbSize: DWORD;
    pwcsUrl: DWORD;
    pwcsTitle: DWORD;
    ftLastVisited: FILETIME;
    ftLastUpdated: FILETIME;
    ftExpires: FILETIME;
    dwFlags: DWORD;
  end;type
  IEnumSTATURL = interface(IUnknown)
    ['{3C374A42-BAE4-11CF-BF7D-00AA006946EE}']
    function Next(celt: Integer; out elt; pceltFetched: PLongint): HRESULT; stdcall;
    function Skip(celt: Longint): HRESULT; stdcall;
    function Reset: HResult; stdcall;
    function Clone(out ppenum: IEnumSTATURL): HResult; stdcall;
    function SetFilter(poszFilter: PWideChar; dwFlags: DWORD): HResult; stdcall;
  end;type
  IUrlHistoryStg = interface(IUnknown)
    ['{3C374A41-BAE4-11CF-BF7D-00AA006946EE}']
    function AddUrl(pocsUrl: PWideChar; pocsTitle: PWideChar; dwFlags: Integer): HResult; stdcall;
    function DeleteUrl(pocsUrl: PWideChar; dwFlags: Integer): HResult; stdcall;
    function QueryUrl(pocsUrl: PWideChar; dwFlags: Integer; var lpSTATURL: TSTATURL): HResult; stdcall;
    function BindToObject(pocsUrl: PWideChar; var riid: TGUID; out ppvOut: Pointer): HResult; stdcall;
    function EnumUrls(out ppenum: IEnumSTATURL): HResult; stdcall;
  end;type
  IUrlHistoryStg2 = interface(IUrlHistoryStg)
    ['{AFA0DC11-C313-11D0-831A-00C04FD5AE38}']
    function AddUrlAndNotify(pocsUrl: PWideChar; pocsTitle: PWideChar; dwFlags: Integer;
      fWriteHistory: Integer; var poctNotify: Pointer;
      const punkISFolder: IUnknown): HResult; stdcall;
    function ClearHistory: HResult; stdcall;
  end;function ClearIEHistory:integer;
const
    CLSID_CUrlHistory: TGUID = '{3C374A40-BAE4-11CF-BF7D-00AA006946EE}';
var
  IEHistory:IUrlHistoryStg2;
begin
  IEHistory:=CreateComObject(CLSID_CUrlHistory) as IUrlHistoryStg2;
  IEHistory.ClearHistory;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  ClearIEHistory;
end;
**********************
uses wininet;procedure TForm1.Button1Click(Sender: TObject);
var
  cache_info:PInternetCacheEntryInfo;
  cbSizeOf_Cache_info:dword;
  hw:hwnd;
  buf:tstrings;
begin
//  buf:=tstringlist.Create;
  new(cache_info);
  hw:=FindFirstUrlCacheEntryEx(nil,0,NORMAL_CACHE_ENTRY or URLHISTORY_CACHE_ENTRY,0,cache_info,@cbSizeOf_Cache_info,nil,nil,nil);
  if hw<>0 then
  begin
    DeleteUrlCacheEntry(cache_info.lpszSourceUrlName);
//    buf.Add(cache_info.lpszSourceUrlName);
    while FindNextUrlCacheEntryEx(hw,cache_info,@cbSizeOf_Cache_info,nil,nil,nil) do
//      buf.Add(cache_info.lpszSourceUrlName);
      DeleteUrlCacheEntry(cache_info.lpszSourceUrlName);
  end;
  FindCloseUrlCache(hw);
  dispose(cache_info);
//  showmessage(buf.Text);
//  buf.Free;
end;