U++

Test case (main.cpp):

#include <CtrlLib/CtrlLib.h>

using namespace Upp;

/*
class MyCtrl : public DHCtrl {
public:

};
*/

class Window : public TopWindow {
public:
    Window() {
        // Assist++ dosen't work here
    }

private:
    MyCtrl myCtrl;
};

GUI_APP_MAIN
{
    Window win;
    win.Execute();
}