VB 如何在程序中判断本机是否连接到网络？

如题，谢谢！ 问题点数：20、回复次数：2Top

1 楼supergreenbean（超级绿豆(MSMVP - VB) - 升级归来~）回复于 2006-03-16 21:20:58 得分 5

请参阅   InternetGetConnectedStateTop

2 楼51365133（渊海）回复于 2006-03-16 22:21:13 得分 15

InternetGetConnectedState  
  BOOL   InternetGetConnectedState(  
          OUT   LPDWORD   lpdwFlags,  
          IN   DWORD   dwReserved  
  );  
   
  Retrieves   the   connected   state   of   the   local   system.    
   
  Returns   TRUE   if   there   is   an   Internet   connection,   FALSE   otherwise.    
  lpdwFlags    
  Address   of   a   double-word   variable   where   the   connection   description   should   be   returned.   Can   be   a   combination   of   the   following   values:   INTERNET_CONNECTION_MODEM     Local   system   uses   a   modem   to   connect   to   the   Internet.    
  INTERNET_CONNECTION_LAN     Local   system   uses   a   local   area   network   to   connect   to   the   Internet.    
  INTERNET_CONNECTION_PROXY     Local   system   uses   a   proxy   server   to   connect   to   the   Internet.    
  INTERNET_CONNECTION_MODEM_BUSY     Local   system's   modem   is   busy   with   a   non-Internet   connection.    
   
  dwReserved    
  Reserved.   Must   be   set   to   zero.    
  Top

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• lpdwflags
• modem
• dwreserved
• connection
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