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 isattached tonetwork>
else<PC is notattached tonetwork>