WSAIsBlocking

This function has been removed in compliance with the Windows Sockets 2 specification, revision 2.2.0.

The function is not exported directly by the WS2_32.DLL, and Windows Sockets 2 applications should not use this function. Windows Sockets 1.1 applications that call this function are still supported through the WINSOCK.DLL and WSOCK32.DLL.

Blocking hooks are generally used to keep a single-threaded GUI application responsive during calls to blocking functions. Instead of using blocking hooks, an applications should use a separate thread (separate from the main GUI thread) for network activity.

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