Private Sub CommandButton1_Click()
'SOURCE:http://www.excel-downloads.com/forum/69198-envoyer-un-mail-avec-mailto.html
'auteur: PierreJean
Dim HyperLien As String, Objet As String, Corps As String
Objet = "L'objet du mail"
Corps = "Le message"
Corps = Application.WorksheetFunction.Substitute(Corps, vbCrLf, "%0D%0A")
ad = TextBox1.Text 'adresse mail saisie dans la TextBox de l 'UserForm
HyperLien = "mailto:" & ad & "?cc=" & copie
HyperLien = HyperLien & "&Subject=" & Objet & " (à " & Time() & ")"
HyperLien = HyperLien & "&Body=" & Corps
ActiveWorkbook.FollowHyperlink HyperLien
End Sub