ok, thank you for your attention.

sure. I already saw that document and downloaded "[MS-MMSP].pdf" for reading. Then I read it roughly. Could you tell me about what i may be missing.

Thank you for your answer. Should i study RTSP for that work? hm... anyway, your answer is very helpful and will be helpful. However, I am still wondering how to connect to mms url such as "mms://wmc1.liquidviewer.net/WEEI" when programming socket. The below is extracted on the URL you mentioned. "As of 2012 Microsoft still recommends[1] using "mms://" as a "protocol rollover[2] URL"." Therefore, whether or not i use RTSP, i have to know the way to connect mms url with socket for my work. In this part, do you have any answer? thank you for your interest.

I'm studying MMS Protocol in order to develop the program connecting to FM Radio broadcast of which the url scheme is mms://domain_name/sub_name(directory name?) such as mms://wmc1.liquidviewer.net/WEEI I can obtain the ip address of mms url above, but i don't know the meaning of sub_name. it's important when i write tcp socket code. The socket function usually takes ip address and port number. The MMS protocol's port number is used with 1755. If i have ip address and port number, i can write code as below. ------------------------------------------------------------- const int MMF_PROTOCOL = 1755; char sServerIP[] = "127.0.0.1"; if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) ErrorHandling("WSAStartup() error!"); hSocket=socket(PF_INET, SOCK_STREAM, 0); if(hSocket == INVALID_SOCKET) ErrorHandling("socket() error"); memset(&servAddr, 0, sizeof(servAddr)); servAddr.sin_family=AF_INET; servAddr.sin_addr.s_addr=inet_addr(sServerIP); servAddr.sin_port=htons(MMF_PROTOCOL); if(connect(hSocket, (struct sockaddr*)&servAddr, sizeof(servAddr))==SOCKET_ERROR) ErrorHandling("connect() error!"); while(1) { send(hSocket, message, strlen(message), 0); ... } ------------------------------------------------------------- However, i don't know how to connect that mms url owing to the sub_name(directory?). if mms url is mms://111.222.333.444, i can try to connect server with socket because in that case i know ip address and port number(MMS Protocol's port number, 1755). But, with mms://111.222.333.444/sub_name(directory?), i can't connect due to sub_name. I want to take account of sub_name, then do my purpose. Do you know anybody about this problem?