Event handler for list-boxes
virtual void OnListBox( UINT id, int nCurSel, const CXlControlListBox* ctl );
ID of the list-box.
New selection of the list-box.
Pointer to the control which originated the event.
This overrideable function is called whenever the current selection of a list-box (CXlControlListBox) is changed by the user. Note that it will only be called if the list-box has been set to trigger events (see CXlControl::SetTrigger()).
Its default behaviour is to do nothing.