Determine Tab Containing a Control

I have a spell checker routine that will scan through all the textboxes in a form, and when it finds a misspelling, it will display the spelling correction dialogue. I have a form that uses the XtremeSuite TabControl. What I would like to do, is when I find a textbox with a misspelled word, to set the current tab to the control's tab, so the user can see the tab page that contains the control in question. With previous tab controls I've used, there was a GetTab(hWnd as long) function, where you could pass it the handle to a control, and it would return the relevant tab number. I don't believe there is an equivalent function with these controls, so I was hoping for a bit of help.

Is it possible to add in this functionality? Is there a different way I could go about doing this, for instance iterating through a collection of controls within each tab or tabControlPage? I would prefer not to use a hack like storing the tab index in each textbox tag property if at all possible.

Thank you.