What do the flags in the send() and recv() mean, when and how can I use them. I allways use 0 as a flag parameter.
Here is the reference:

15 Recv
Declaration
Function Recv (Sock:Longint;Var Addr;AddrLen,Flags:Longint) : Longint;

Description
Recv reads at most Addrlen bytes from socket Sock into address Addr. The socket must be in a connected state. Flags can be one of the following:
1
: Process out-of band data.
4
: Bypass routing, use a direct interface.
??
: Wait for full request or report an error.
The functions returns the number of bytes actually read from the socket, or -1 if a detectable error occurred.

: What do the flags in the send() and recv() mean, when and how can I use them. I allways use 0 as a flag parameter.

It's largely protocol dependant, this is just what I know with TCP. With both send() and recv() you can use the MSG_OOB flag, which is most commonly used to send "urgent" data. On recv() you can also use the MSG_PEEK flag which will read the incoming data, but not remove it from the buffer.

If you look on MSDN you might find some other options as well.

Thanx, that realy helped me a lot.