Wt

#include <Wt/WApplication>

#include <Wt/WAudio>

#include <Wt/WComboBox>

class App : public Wt::WApplication

{

public:

	App(const Wt::WEnvironment& env) : Wt::WApplication(env)

	{

		Wt::WAudio *audio = new Wt::WAudio(root());

		audio->setId("audio0");

		Wt::WComboBox* cb = new Wt::WComboBox(root());

		cb->addItem("1");

		cb->addItem("2");

		cb->addItem("3");

		cb->setCurrentIndex(0);

		cb->activated().connect(this, &App::appDoSomething);

	}

	void appDoSomething()

	{

		new Wt::WComboBox(Wt::WApplication::instance()->root());

	}

};

Wt::WApplication* CreateApp(const Wt::WEnvironment& env)

{

    return new App(env);

}

int main(int argc, char* argv[])

{

    return Wt::WRun(argc, argv, CreateApp);

}