identificar si hay conexion

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.


Saludos
Cholo Lennon
Salta, ARG