class Ma_app : public TopWindow {
	
	public:
	Ma_app() {

		Zoomable().Sizeable();
				
		for(int col = 0; col < 10; col++) {
			grid.AddColumn(Format("col %d", col));
			for(int row = 0; row < 10; row++) {
				grid.Set(row, col , "x");
			}
		}
		
      //VVVVVVVVVVV HERE COMES THE FAULT LINE VVVVVVVVVVVVV
		grid.SelectRow(false).RowChanging(false);
		
		Add(grid.SizePos());
	}
	
	GridCtrl grid;
};

GUI_APP_MAIN
{
	Ma_app().Run();
}