#include <CtrlLib/CtrlLib.h>

using namespace Upp;
class SMain : public TopWindow {
    
public:
    typedef SMain CLASSNAME;
    SMain();
    void Close() override {
        delete this; // error show heap is corrupted !!!!
    }
    
};
SMain::SMain()
{
}

GUI_APP_MAIN
{
	SMain se;
	se.Run();
 	
}

    void Close() override {
        delete this; // error show heap is corrupted !!!!
    }
 

     void Close() override {
        delete this;     // now it works because it was instantiated as a pointer!!!
     }

GUI_APP_MAIN
{
	SMain* se;
	se = (new SMain);
	se->OpenMain();
	se->se.Run(); //Run when associed a especific window or "Ctrl::EventLoop()" when not associed a window 
                      //   and while any window open
 	
} 

 

 WhenClose = [=] { doSomething; };
 ...
 void SMain::doSomething()
 {
   ...
   ... 
   
   if(okGetout){ //and if necessary close
     Close();
   }
 }