Event handler for check-boxes
[C++]
virtual void OnCheckBox(
   UINT id,
   BOOL bChecked,
   const CXlControlCheckBox* ctl
);
ID of the button which was pressed.
New checked state of the button which was pressed.
Pointer to the control which originated the event.
This overrideable function is called whenever a check-box 
            (CXlControlCheckBox)
            is checked or unchecked.
            Note that it will only be called if the check box
            has been set to trigger events 
            (see CXlControl::SetTrigger()). Its default behaviour is to do nothing.
            
Header: xldialog.h