I don't understand what you mean. I just told you what dll does the sending (thipx32.dll for C&C95, wsock32.dll for RA95 (v3.03) and TS and RA2). What would you want to change?
CnCNet acts EXACTLY the same as if the people involved would be on the same LAN, so just like on the LAN, you simply have to make sure you got the same version. But there's no difference between the exe of that full RA and the one from the 3.03 patch; it's all just v3.03.