That would be fairly straightforward. You would need to set an Outlook rule to identify the incoming messages and run a script from that rule. The script would save then open the attachment in Excel, then open the target workbook and do whatever processing you require before closing the attachment and optionally deleting it from the filing system. Something like the following:
Code:
Sub ProcessAttachment(Item As Outlook.MailItem)
Dim olAtt As Attachment
Dim strFilename As String
Dim xlApp As Object
Dim xlWB As Object
Dim xlTarget As Object
Const strTarget As String = "C:\Path\TargetBookName.xlsx"
If Item.Attachments.Count > 0 Then
For Each olAtt In Item.Attachments
If Right(olAtt.Filename, 4) = "xlsx" Then
strFilename = "C:\Path\" & olAtt.Filename
olAtt.SaveAsFile strFilename
Set xlApp = GetObject(, "Excel.Application")
If Err <> 0 Then
Set xlApp = CreateObject("Excel.Application")
End If
On Error GoTo 0
Set xlWB = xlApp.workbooks.Open(strFilename)
Set xlTarget = xlApp.workbooks.Open(strTarget)
'+++++++++++++++++++++++++++++
'Do stuff with the 2 workbooks
'+++++++++++++++++++++++++++++
xlWB.Close 0 'Close attachment without saving
'Kill strFilename 'Optional delete the saved attachment
Set xlWB = Nothing
Set xlTarget = Nothing
Set xlApp = Nothing
Exit For
End If
Next olAtt
End If
End Sub