#include <CtrlLib/CtrlLib.h>
using namespace Upp;

class App:public TopWindow {
	typedef App CLASSNAME;
	Array<LocalProcess> p;
	Button b;
public:
	App(){
		Add(b.HCenterPos().VCenterPos());
		b.SetLabel("Push me!");
		b<<=THISBACK(Launch);
	}
	void Launch(){
		// we add a new process to the array and start a command
		p.Add().Start("calc.exe");
	}
	~App(){
		// if you wish the processes run after closing the app, detach them like this:
		for(int i=0;i<p.GetCount();i++){
			p[i].Detach();
		}
	}
};

GUI_APP_MAIN{
	App().Sizeable().Run();
}