怎样可以检测本台电脑是否已拨号上网？又怎样可以知道拨号上网后的IP？

[d_delphi]

同上。

[qiandeng]

检测本台电脑是否已拨号上网
InternetCheckConnection函数
要uses WinInet
比如
if InternetCheckConnection('http://www.sohu.com/', 1, 0) then

edit1.text:= 'Connected'

else

edit1.text:= 'Disconnected';
得到拨号的ip
比较烦
调用
RasEnumConnections
RasGetProjectionInfo
函数
这两个函数在RasApi32.DLL和RasApi16.DLL中(windows系统目录)
怎么调用，自己去搜索以前的帖子吧。。。

[qiqi97]

检测计算机是否上网

function InternetConnected: Boolean;
const
// local system uses a modem to connect to the Internet.
INTERNET_CONNECTION_MODEM = 1;
// local system uses a local area network to connect to the Internet.
INTERNET_CONNECTION_LAN = 2;
// local system uses a proxy server to connect to the Internet.
INTERNET_CONNECTION_PROXY = 4;
// local system's modem is busy with a non-Internet connection.
INTERNET_CONNECTION_MODEM_BUSY = 8;
var
dwConnectionTypes : DWORD;
begin
dwConnectionTypes := INTERNET_CONNECTION_MODEM+ INTERNET_CONNECTION_LAN
+ INTERNET_CONNECTION_PROXY;
Result := InternetGetConnectedState(@dwConnectionTypes, 0);
end;

end.

[yxg20803]

up!!!!!!!!!

[zhiwuyang602]

lou shang shang dui !