Function SocketFDSetNew() Professional
Creates a new descriptor set for sockets.
SocketFDSetNew( [@<nError>] ) --> nFDSet
The function renurns a numeric handle for the new descriptor set or 0 in case of an error.
If an application uses multiple sockets (multiplexing I/O requests), it may group the sockets in descriptor sets. A descriptor set is similar to an array holding multiple sockets, but is identified via a numeric handle returned from SocketFDSetNew(). This handle must be used for all SocketFD..() functions. Once a new descriptor set is created, sockets are added to it using the function SocketFD_SET(). The readiness of individual sockets contained in the descriptor set to read/write messages is then checked with the SocketSelect() function.
When a descriptor set is no longer needed in an application, its resources must be released by calling the SocketFDSetDelete() function.
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