I have created a word document from excel (with the below code).

Suppose if there is new change in the excel file, say adding a new row, then i need the word document to append the new modifications to the existing word document instead of recreating the document from the scratch.

What i require is:-

Create a new file (done already)
Copy the values from excel spreadsheet (done already)
Make changes - Add new rows in excel
Check if the word file exists, if not create
Else Append the new changes to existing word document (do not create!!)
Can you please let me know how to meet this functionality

Dim wdvar As Object
Set wdvar = CreateObject("Word.Application")
With wdvar
.Visible = True
.Activate

.Documents.Add
savename = Environ("UserProfile") & "\Desktop\Report.docx " & _
Format(Now, "yyyy-mm-dd") & ".docx"

.ActiveDocument.SaveAs2 savename
End With
Set wdvar = Nothing