property controls the size of the reserved letterhead space.
expression.Letterhead
expression Required. An expression that returns a LetterContent object.
Example
This example creates a new LetterContent object, reserves an inch of space at the top of the page for a preprinted letterhead, and then runs the Letter Wizard by using the RunLetterWizard method.
Dim lcNew As LetterContent
Set lcNew = New LetterContent
With lcNew
.Letterhead = True
.LetterheadLocation = wdLetterTop
.LetterheadSize = InchesToPoints(1)
End With
ActiveDocument.RunLetterWizard _
LetterContent:=lcNew, WizardMode:=True