You still don't disclose your Progress/OpenEdge version ...
IIRC, the support for some widgets like a toggle-box or combo-box in a browse widget was added with OpenEdge 10.1A. If you run on an earlier version you need to roll your own solution, but, to be honest, I've never dug into this - therefore others will be more competent here.
Heavy Regards, RealHeavyDude.