void Exit0() {
		if(CommPort.IsOpened()) CommPort.Close();
		if(CommPort2.IsOpened()) CommPort2.Close();
		Thread::ShutdownThreads();
		Break(); // Closes window with 'Cancel'
	}	

GUI_APP_MAIN{
	GPSv2().Run();
	if(CommPort.IsOpened()) CommPort.Close();
	if(CommPort2.IsOpened()) CommPort2.Close();
	Thread::ShutdownThreads();
}

// A global bool end;

		while (CommPort.ReadDataWaiting() ) {
		    if(end) break;
                        ...
                    Sleep(980);
                    ....

	void Exit0() {
           end = true; Sleep(2000);
	   if(CommPort.IsOpened()) CommPort.Close();
	   if(CommPort2.IsOpened()) CommPort2.Close();
	   Thread::ShutdownThreads();
	   Break(); // Closes window with 'Cancel'
	}	
void endX(){end = true;	Sleep(2000);}	

GUI_APP_MAIN{
    GPSv2().Run();
    endX();
    if(CommPort.IsOpened()) CommPort.Close();
    if(CommPort2.IsOpened()) CommPort2.Close();
    Thread::ShutdownThreads();
}

enum ListLoaderEnum {LL_RESET, LL_KILLLOAD};

class MainWin : public WithMainLayout<TopWindow> {
protected:

	StaticMutex loadListLock;
	Thread listLoaderThread;
	volatile Atomic stopFetchingTags; 

public:
	MainWin() : stopFetchingTags(0)	{

	virtual void Close() {
		// While we are in the Close event, no threads can continue, so a Wait will lock up the system
		// Notify threads to stop, then trigger a callback
		int x = listLoaderThread.GetCount();
		if (x) {
			loadListLock.Enter();
			stopFetchingTags = LL_KILLLOAD;
			loadListLock.Leave();
			this->ProcessEvents();
			Sleep(100);
			PostCallback(THISBACK(Close));
		} else {
			TopWindow::Close();  // Won't close unless this is called
		}
	}

	void EnrichDbFromTags() {
		listLoaderThread.Run(THISBACK(EnrichDbFromTagsThread));
	}

	void EnrichDbFromTagsThread() {
		stopFetchingTags = LL_RESET;
		
		...

		while(lst.Fetch()) {

			if (stopFetchingTags == LL_KILLLOAD) {
				break;
			}
		...
		}
	}

		while (CommPort.ReadDataWaiting() ) {
		    if(end) break;
		    try{
                      .... 
void endX(){end = true;	Sleep(2000);}	

GUI_APP_MAIN{
	GPSx2().Run();
	if(CommPort.IsOpened()) CommPort.Close();
	if(CommPort2.IsOpened()) CommPort2.Close();
	endX();
}

void ButtonClicked() // This function is the button event
{
    Thread().Run(THISBACK1(RunImdbSearchAsync, row));
}
void RunImdbSearchAsync(int row) // Thread tasks
{
    ImdbManager im;
    im.WhenImdbMovie = THISBACK(ImdbMovieFound);
    im.ImdbSearch(mMovieList.Get(row, 0)); // This is a function that wraps around three tasks:
                                           // 1. Retrieving HTML using HttpRequest;
                                           // 2. Parsing HTML using Regular Expression;
                                           // 3. Creating an object containing the parsed data and returning it.
    PostCallback(THISBACK(AfterImdbSearch));
}

void endX(){
//	clean up code here	
	...	
	...
	Sleep(2000); // This is required
}	

GUI_APP_MAIN{
	NLNe().Run();
	Thread::ShutdownThreads();
	endX();
}

		while(!in.IsEof()){
    		if(Thread::IsShutdownThreads()){ // or you can use a global bool
	    	    in.Close();
	    	    break;
		    }

GUI_APP_MAIN
{
	MovieManager().Run();
	ExitProcess(0); // End every thread inside your program
}