I'm using ms winsocket activex control senddata() method
to send to send binary data to tcp port.

I discovered that if packet contains zero bytes
(chr(0)s) this packet is not sent properly:
some zeroes in received packet are replaced with some other random
bytes. Those replacements seems to be random: sending same packets
again and again causes different corruptions.
However, correct packet is never received.
If packet doesn't contain 00s, it is sent properly.

Is it possible to fix this bug or use some other program to send
data to tcp port: how to call wininet.dll directly or is there
some other ways to send/receive data through tcp ports ?