Option Explicit
Sub test()
Dim WordApp As Word.Application
Dim WordDoc As Word.Document
Dim i As Long, fichier As String
fichier = ThisWorkbook.Path & "\monDocument.doc"
Set WordApp = CreateObject("word.application")
Set WordDoc = WordApp.Documents.Open(fichier)
WordApp.Visible = False
For i = 1 To 3
'les signets du document Word sont nommés Signet1 , Signet2 , Signet3
With WordDoc.Bookmarks("Signet" & i).Range
.Text = Cells(i, "A")
.Font.Name = "arial"
.Font.Size = 16
.Font.Bold = True
.Font.Italic = True
.Font.Color = RGB(3, 34, 76)
End With
Next i
WordApp.Visible = True
End Sub