Using macros, how do I specify a fully qualified name of a text field within
a form on one page of a tab control?
For example, on a normal form it would be:
Forms![FormName]![FieldName]
Forms don't have Fields (Tables have Fields); Forms have Controls.
The Tab Page is irrelevant with respect to referencing the control. If
the textbox is on a Subform, you need to use the Name property of the
main form and of the Subform control; the Subform control is the "box"
containing the subform, and it may or may not have the same name as
the form within it. The syntax is
[Forms]![Formname]![Subformcontrol].Form![textboxname]
The brackets are usually optional unless the form or control names
contain blanks or other special characters, but it never hurts to put
them in.
John W. Vinson [MVP]