🚀 go-pugleaf

When i put InternetReadFile in Thread it does not read anything ... same
thing without thread work fine.
my thread's execute procedure:

    char buf[512];
    Synchronize (CheckUsage);
    while(InternetReadFile(hResource, buf, sizeof (buf), &bytesRead)){
        if(!WriteFile(hFile, buf, bytesRead, &BytesWritten, NULL)){
            Terminate ();
            }
        Synchronize (UpdateCaptions);
        if (Terminated)
            break;
        }

i call thread from with:
    DownloadThread *pLnLoading = new DownloadThread (true);
    pLnLoading->hResource = hResource;
    pLnLoading->hFile = hFile;
    pLnLoading->Resume ();

what can cause problem ... i've trace it with debugger but i could not find
anything except that on InternetReadFile it breaks ...
hResource is defined as well as hFile (which is not yet used)

One more question. Is it ok to directly write to file or should i use some
kind of memory buffer and than write complete file ?

thanx