NoProofing a formfield using VBA

Hello,
I was wondering if it is possible to set a formfield
to NoProofing = true.
for example similar to:
ActiveDocument.Styles("theformfield").NoProofing = True ,
by identifying the bookmark name.

Presently, I use:
Selection.GoTo What:=wdGoToBookmark, Name:="Text1"
Selection.NoProofing = True

I would like to set the formfield without going to the
bookmark.

Is this possible ?

Thanks .
Micheline