CAB or anyone else for that matter,
Just a suggestion on the appearance, I see that you use 2 seperator lines on you dialog, Maybe try something like the one I used on this dialog for more of a system look? I stumbled upon this by accident. draw 2 line in acad one grey and one white, with a slight gap between them, create a slide then load it using dialog_background as the back color and this is what you get.