The SSTab does hide/show the child controls by shifting them to/from a negative value. Basically all child controls do have the SSTab control instance as parent HWND.
Is there any way to determine the tab index for the child controls – any other than looping the SSTab.Tab property? How does the SSTab instance manage the child controls to tab association?
Not that I’ve seen. Your best bet is too move each tab’s controls into a dedicated picturebox or frame.
This allows you to tell what the control’s parent is and eventually move away from the buggy SSTab control.
There is an article I wrote explaining this and various other flaws with the SSTab control at:
http://hashvb.earlsoft.co.uk/Tabbed_dialogs