How to get all Installed programs in Windows Using Qt

Asad

I want to get all the installed programs using Qt code.
@QSettings settings(QLatin1String("HKEY_CURRENT_USER\SOFTWARE"),QSettings::NativeFormat);
qDebug()<<settings.fileName();

QString exactloc = settings.value(QLatin1String("InstallLocation"),0).toString();@

I tried this but its always given the Null string.
IS there any shortest way to get all the installed programs.
Please Give me valuable suggestion or link or code .
Thanks