Ed,
I don't know why M$ left CUROBJ in since it no longer works. You will need to find every occurence of CUROBJ and replace it with the correct call to SetFocus().
For example, if the object you are changing the focus to has the name of txtLastFocus and it is in the same container as the object you are currently on, the issuing This.Parent.txtLastFocus.SetFocus() will set the focus to the object you want. It gets a bit more complicated if the objects are in different containers, but you see the idea.
Regards,
MarkA