Hi guy's

Can anyone help me put the following into the correct syntax so it will
work using 2003 please..

Function NewName() As String
Dim strFName As String
strFName = ActiveWorkbook.FullName
GetFullFile = Replace(strFName, ".xls", "a")
End Function

The reason I am wanting to use the above is to strip away the extension
because when the below code runs it saves it like this:

TMS_2012_10_19.xlsa.xml

When in fact I need it to be:

TMS_2012_10_19a.xml

My issue is I don't know where to insert it, or at least call the
function in order to set mySwb as the newly renamed active ( NewName )
workbook.

Sub Create_XML()

Dim myExtStr As String
Dim mySwb As Workbook
Dim myFileDir As String
Dim myFilePath As String
Dim myFileName As String

Set mySwb = ActiveWorkbook

myFileName = mySwb.Name & "a"
myFilePath = "T:\myFolder\"
myExtStr = ".xml": FileFormatNum = 46


With mySwb
.SaveAs myFilePath & myFileName & myExtStr
End With

End Sub

TIA
Mick.