You can access it via a ListObject object, for example:
Code:
Worksheets("Sheet1").ListObjects("oTable").ListColumns("Header1").Range.Cells(1).Select
You have to be careful with the [ ] because they are also shorthand for the Evaluate method in VBA. This would also potentially work, but (in my opinion) it is confusing and an ugly piece of code best avoided:
Code:
[oTable[[#Headers],[Header1]]].Select