listing the applications running on system, using qtdbus

[mj]

Hi,
using below sample code im able to list all the dbus services running in my system.
I want to list all the application (like- video player, chat apps, browser.) running in my system, is their any api or tutorial which explains it.

#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QStringList>
#include <QtDBus/QtDBus>
int main (int argc, char **argv)
{
    // listing all registered service names.
    QCoreApplication app(argc, argv);
    QObject  *myObject;
    QDBusConnection bus = QDBusConnection::sessionBus();
    QStringList serviceNames = bus.interface()->registeredServiceNames();
    qDebug() << serviceNames;
    return 0;
}

#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QStringList>
#include <QtDBus/QtDBus>
int main (int argc, char **argv)
{
    // listing all registered service names.
    QCoreApplication app(argc, argv);
    QObject  *myObject;
    QDBusConnection bus = QDBusConnection::sessionBus();
    QStringList serviceNames = bus.interface()->registeredServiceNames();
    qDebug() << serviceNames;
    return 0;
}

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thanks.