/建立全局的结构s_wsadata
//结构如下:
//version unsignedinteger
//highversion unsignedinteger
//description[257] character
//systemstatus[129] character
//maxsockets unsignedinteger
//maxupddg unsignedinteger
//vendorinfo string
//声明 extern function
function int WSAStartup( uint UIVersionRequested, ref s_WSAData lpWSAData ) library "wsock32.dll" alias for "WSAStartup;Ansi"
function int WSACleanup() library "wsock32.dll" alias for "WSACleanup;Ansi"
function int WSAGetLastError ( ) library "wsock32.dll" alias for "WSAGetLastError;Ansi"
function i