判断电脑是否联网:
#41:PC is connected to a network or not
If you want to know if the PC is connected to a network under MS Windows then you can call a GetSystemMetrics() function (Windows API) with SM_NETWORK parameter:
if (GetSystemMetrics(SM_NETWORK) AND $01 = $01) then <PC is attached to network> else <PC is not attached to network>