간단하게 인터넷연결 체크하기

uses
  .., WinInet;

function isInternetConnected : Boolean;
var  dwFlags : DWORD;
begin
  Result := InternetGetConnectedState(@dwFlags, 0);
end;

- Flag 정보

https://docs.microsoft.com/en-us/windows/win32/api/wininet/nf-wininet-internetgetconnectedstate