*sent = false;
while (!(*sent))
{
	switch (layAddProject->Execute())
	{
		case IDOK:
...
...
...

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

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



class WindowTest : public WithLayout1<TopWindow> {
	private:
		void onButton1Click();
	
	public:
		typedef WindowTest CLASSNAME;
		WindowTest();
};

void WindowTest::onButton1Click()
{
	WithLayout2<TopWindow> * wnd = new WithLayout2<TopWindow>;
	CtrlLayoutOKCancel(*wnd, "Title2");
	//wnd->Open();
	//wnd->Open(this);
	wnd->OpenMain();
}

WindowTest::WindowTest()
{
	CtrlLayout(*this, "Title1");
	Button1 <<= THISBACK(onButton1Click);
}

GUI_APP_MAIN
{
	WindowTest().Run();
}