It seems logical to reference a control that is contained within a tab control by including the name of the tab control.
However, from many frustrating error messages, it appears that the correct way of referencing a tab control is to omit the name of the tab control. e.g Main form is called frmMain Tab control on main form is called tab1 (Imaginative name!) Target control on tab control is called txtExample
So it seems logical to believe the reference to the control would be:
However, this will result in an error message. So, the correct reference for this is: