struct MyExample : ParentCtrl {
	virtual void Init() = 0;
};

struct Tab1 : WithTab1<MyExample> {
	Tab1() {...}		// No GUI here
	virtual void Init() {
		CtrlLayout(*this);	
		...		// GUI here
	}
...
}

INITBLOCK {
	RegisterExample("Basic", new Tab1);
}

...

GUI_APP_MAIN
{
	for (int i = 0; i < Examples().GetCount(); ++i)
		Examples()[i].ctrl->Init();	// GUI loaded here

	ScatterCtrl_Demo().Run();
}