procedure DeleteIECache(httpStr: string); // 清理IE緩存,IE.cookies
var 
  lpEntryInfo: PInternetCacheEntryInfo;  
  hCacheDir: LongWord;  
  dwEntrySize: LongWord;  
  cachefile: string;  
begin 
  dwEntrySize := 0;
  FindFirstUrlCacheEntry(nil, TInternetCacheEntryInfo(nil^), dwEntrySize);  
  GetMem(lpEntryInfo, dwEntrySize);  
  if dwEntrySize > 0 then
    lpEntryInfo^.dwStructSize := dwEntrySize;
  hCacheDir := FindFirstUrlCacheEntry(nil, lpEntryInfo^, dwEntrySize);
  if hCacheDir <> 0 then 
  begin 
    repeat 
      if (lpEntryInfo^.CacheEntryType) and (NORMAL_CACHE_ENTRY) = NORMAL_CACHE_ENTRY then
        cachefile := pchar(lpEntryInfo^.lpszSourceUrlName);
      if pos(httpStr, cachefile) > 0 then    //清除特定網(wǎng)站的cookies.例如baidu.com
        DeleteUrlCacheEntry(pchar(cachefile)); //執(zhí)行刪除操作  
      FreeMem(lpEntryInfo, dwEntrySize);
      dwEntrySize := 0;
      FindNextUrlCacheEntry(hCacheDir, TInternetCacheEntryInfo(nil^), dwEntrySize);  
      GetMem(lpEntryInfo, dwEntrySize);  
      if dwEntrySize > 0 then 
        lpEntryInfo^.dwStructSize := dwEntrySize;  
    until not FindNextUrlCacheEntry(hCacheDir, lpEntryInfo^, dwEntrySize);  
  end;  
  FreeMem(lpEntryInfo, dwEntrySize);  
  FindCloseUrlCache(hCacheDir);  
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  DeleteIECache(Edit1.Text);
end;