Sorry to hear that nothing you tried will work the scroll wheel the right
way for you.
Does your document with formfields have to be in the protected mode in order
to enter information in the fields manually? If you went into the VBA Editor
to create what you created, then it probably was an userform and not a
document with formfields.
It is a common mistake to mix up the names of a userform dialog and a
document with formfields, which usually has to be in the protected state to
work manually. They share similar object names, like textbox. The objects
embedded in documents are activex based, from what I understand; so the
MacWord doesn't use all of them, I think.
Userform dialogs pop up when the .show method is used. In Word VBA Editor,
go to menu Insert/Userform to start one. Then use the menu View/Toolbox, if
the Toolbox doesn't appear right away. From the Toolbox you can click on an
object and then drag a box shape where you want it, like you do for your
formfield objects. When an object on the userform is selected, the
Properties box will show the parameters that you can change manually or by
VBA code. Each userform has event subroutines, too, like a button's click
event. To test a userform, use Run, while a form is selected, just like
Running a subroutine. A dialog will appear, looking like a window, with a
close button in the upper corner. A userform dialog can gather and display
information and send information to bookmarks or fields in a document with a
template attached.
You could use both a userform dialog and a document with formfields, by
popping up an userform dialog to get information; and have it
'auto-populate' the textfields and checkboxes on a formfield document.
Give a try, when you want to experiment.