void C4StartupAboutDlg::OnRegisterBtn(C4GUI::Control *btn) { // open hardcoded registration URL // URL needs lowercase language code, two-character code only StdStrBuf sLangCode; sLangCode.Format("%.2s", Config.General.Language); sLangCode.ToLowerCase(); OpenURL(FormatString("http://www.clonk.de/register.php?lng=%s&product=cr", sLangCode.getData()).getData()); }