Opens the header source attached to a mail merge main document, or activates the header source if it's already open.
Note If the mail merge main document doesn't have a header source, this method causes an error.
expression.EditHeaderSource
expression Required. An expression that returns a MailMerge object.
Example
This example attaches a header source to the active document and then opens the header source.
With ActiveDocument.MailMerge
.MainDocumentType = wdFormLetters
.OpenHeaderSource Name:="C:\Documents\Header.doc"
.EditHeaderSource
End With
This example opens the header source if the active document has an associated header file attached to it.
Dim mmTemp As MailMerge
Set mmTemp = ActiveDocument.MailMerge
If mmTemp.State = wdMainAndSourceAndHeader Or _
mmTemp.State = wdMainAndHeader Then
mmTemp.EditHeaderSource
End If