VBA - Ouvrir un pdf depuis excel

Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
Private Const SW_SHOWNORMAL = 1

Option Explicit
 
Private Sub OpenPdf(sNomFichier As String)
Dim Rep As Integer
Dim hwnd As Long
    Rep = ShellExecute(hwnd, "Open", sNomFichier, 0&, 0&, SW_SHOWNORMAL)
End Sub

Sub Tst()
Dim sDossier As String
Dim sFichier As String
    sDossier = "C:\Faq\FaqVba\Exemples\SendMails_PDF"
    sFichier = "ApiDistillerRef_7.0.5.pdf"
    
    OpenPdf (sDossier & "\" & sFichier)
End Sub

sFichier = Range("A1")

 ... & ".pdf"