Function SocketCatMark() Professional

Determines whether or not all out-of-band data is read.

SocketCatMark( <nSocket> ) --> lYesNo
This is a numeric socket descriptor identifying a socket.

The function returns .T. (true) when there is no out-of-band data waiting to be read, otherwise .F. (false) is returned.


Out-of-band data may be transmitted separately from regular data packets. If the function returns .T. (true), the next call to SocketRecv() or SocketRecvFrom() performed on the socket will retrieve some or all of the data marked as "out-of-band".


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