{
Usage:
procedure TForm1.Button1Click(Sender: TObject) ;
begin
   DeleteIECache;
end;
}
uses
   WinInet;
procedure DeleteIECache;
var
   lpEntryInfo: PInternetCacheEntryInfo;
   hCacheDir: LongWord;
   dwEntrySize: LongWord;
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
       DeleteUrlCacheEntry(lpEntryInfo^.lpszSourceUrlName) ;
       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;