Accomplish a Form to Create a Letter?

From Excel you could try

Sub CreateWordDocuments()
Const TargetFolder = "C:\temp\"
Dim WordApp As Word.Application
Dim WordDoc As Word.Document

Set WordApp = New Word.Application
WordApp.Visible = True
WordApp.Documents.Add
Set WordDoc = WordApp.ActiveDocument
WordApp.Selection.TypeText Text:="Hi, " & Range("B1") & "! I know you are " & Range("B2") & " years old now. Do you still live in " & Range("B3") & "?"
WordApp.Selection.TypeParagraph

Set WordApp = Nothing
End Sub

You need to make a reference to the Word object library - Tools - References - Microsoft Word nn.0 Object library