The Farpoint Tab control ocx that was previously support by CA Gen is no longer supported by its vendor and there are no suitable replacements that work with CA Gen 8.5 for developing GUI windows. I think you CAN use the Microsoft Form Tab Strip, but then it is up to you to place all of your objects correctly at runtime when the tab is clicked. Very hard to layout and maintain.
I feel that lack of a tab control structure is a gap in the GUI window design of the Gen toolset in Navigation Diagram. Buttons, Menu Bars, Toolbars, etc, are all included, but the very common tab control is not provided without purchase of a third party product and the standard Microsoft common controls tab options do not work. I am recommending this as a toolset enhancement. Anyone agree with me that this would be a good enhancement to CA Gen toolset to add a tab control?