WSAAsyncSelect的威力

 

WSAAsyncSelect

The WSAAsyncSelect function requests Windows message-based notification of network events for a socket.

int WSAAsyncSelect(
  SOCKET s,
  HWND hWnd,
  unsigned int wMsg,
  long lEvent
);

Parameters

s

[in] A descriptor that identifies the socket for which event notification is required.

hWnd

[in] A handle that identifies the window that will receive a message when a network event occurs.

wMsg

[in] A message to be received when a network event occurs.

lEvent

[in] A bitmask that specifies a combination of network events in which the application is interested.