In the window/dialog.hpp there is a call to the DialogBoxParam with incorrect HINSTANCE parameter (NULL).
I guess there should be the same code as before the CreateDialogParam procedure:
 
if (create_params.instance() == NULL) {   
    resource res_info(id);
    create_params.instance(res_info.instance(RT_DIALOG));
}
Because of this missing code there are several drawing issues with some dialog controls.
 
Dmitry