Dosyayı deneyin abey.
Function outlookAcikmi() As Boolean
Dim objOutlook As Object
outlookAcikmi = False
On Error Resume Next
Set objOutlook = GetObject(, "Outlook.Application")
If Not objOutlook Is Nothing Then
outlookAcikmi = True
End If
On Error GoTo 0
Set objOutlook = Nothing
End Function