Hi Peter ...
Initialization and ipdating of pages on a tabbed dialog is easily accomplished by incorporating the PAGE_ON_INIT and PAGE_ON_ACTIVE
into the Dialog Events block and writing the appropriate event handling functions.
Hope this helps
EVENTS_BEGIN
PAGE_ON_INIT(fn_OC_EventHandler_a) // ... for initialization
PAGE_ON_ACTIVE(fn_OC_EventHandler_b) // ... for updating
EVENTS_END