You'll need to define #define ALLOW_ACCESS_TO_INTERNALS_OF_LISTS
Then you can do this
ListAttrType listAttr;
int attrSize = sizeof(listAttr);
err = MemMove (&listAttr, &(listP->attr), attrSize);
listAttr.hasScrollBar = 1;
err = MemMove ( &(listP->attr), &listAttr, attrSize);
I doubt this will be portable when writing pure cobalt apps but it does the trick for os 5 and below. It's a lot of work to implement a table when all you want is a listbox with a real scrollbar.
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