CursorTest.lay:

LAYOUT(CursorTestLayout, 200, 100)
	ITEM(Button, button, SetLabel(t_("Test")).HCenterPosZ(84, 2).VCenterPosZ(32, -2))
END_LAYOUT

CursorTest.cpp:

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

#define LAYOUTFILE <CursorTest/CursorTest.lay>
#include <CtrlCore/lay.h>

class CursorTest : public WithCursorTestLayout<TopWindow> {
	void Test() 	{	Sleep(10000);}

public:
	typedef CursorTest CLASSNAME;
	CursorTest()	
	{
		CtrlLayout(*this, "Cursor Test");
		button.WhenAction = THISBACK(Test);
	};
};

GUI_APP_MAIN
{
	CursorTest().Run();
}

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

struct SleepTest : public TopWindow
{
	typedef SleepTest CLASSNAME;
	
	Button button;

	void Test()
	{
	Sleep(10000); //calls Util.cpp - Sleep()
	}

	SleepTest()
	{
		Title("Sleep Test").CenterScreen().Sizeable();
		SetRect(0,0,200,200);
		
		Add(button.SetLabel(t_("Test")).HCenterPosZ(84, 2).VCenterPosZ(32, -2));
		//button.WhenAction = THISBACK(Test); --- hogs the gui for sleep-time - Alt-D in debug still works
		button.WhenPush = THISBACK(Test); //this is fine
	};
	
	virtual ~SleepTest(){}
};

GUI_APP_MAIN
{
	SleepTest().Run();
}