Dim xlApp As Excel.Application, xlBook As Excel.Workbook
Dim xlSheet As Excel.Worksheet, strFich$
strFich = "...\2021_Fichier_DOA.xlsx"
Set xlApp = CreateObject("Excel.Application")
Set xlBook = xlApp.Workbooks.Open(strFich)
Set xlSheet = xlBook.Sheets(Month)
xlSheet.Range("B20") = "essai"
xlSheet.Range("G18") = Reason