uses WinInet;
procedure TForm1.Button1Click(Sender: TObject);
begin
if InternetGetConnectedState(nil, 0) then ShowMessage('已连接');
end;
uses WinInet;
procedure TForm1.Button1Click(Sender: TObject);
begin
if InternetGetConnectedState(nil, 0) then ShowMessage('已连接');
end;