IETeGUI allows you to easily create tab-style windows with a Gen GUI without needing an OCX.
Each 'tab' is actually a separate client procedure step with standard push buttons placed where you want the tabs. IETeGUI then converts the buttons into a tab style and draws the tab border. It can also place bitmaps on the buttons and supports both horizontal and vertical style tabs. IETeGUI also automatically handles the sizing and positioning of each separate 'tab' window so that you do not need to add in any additional code to the client procedure step apart from a USE of standard IETeGUI functions.
The example below is taken from GuardIEn, which is also a CA Gen developed application.