Title: Get Internet connected state
To get Internet connected state, use InternetGetConnectedState function. This example is working in Delphi4 and higher.
uses WinInet;
...
procedure TForm1.Button1Click(Sender: TObject);
var
State: DWord;
Result: Boolean;
const
Type1 = INTERNET_CONNECTION_MODEM;
Type2 = INTERNET_CONNECTION_LAN;
Type3 = INTERNET_CONNECTION_PROXY;
Type4 = INTERNET_CONNECTION_MODEM_BUSY;
begin
Result:=InternetGetConnectedState(@State, 0);
if Result then
begin
if (State and Type1) = Type1 then
Label1.Caption:=Label1.Caption+'Modem ';
if (State and Type2) = Type2 then
Label1.Caption:=Label1.Caption+'LAN ';
if (State and Type3) = Type3 then
Label1.Caption:=Label1.Caption+'Proxy ';
if (State and Type4) = Type4 then
Label1.Caption:=Label1.Caption+'Modem busy ';
end;
end;