If you can't do what Joachim suggests then do this for each entry in the list, where TESTDATA is the list entry.

VB Code:
  1. Dim lngIndex As Long
  2. Dim strOut As String
  3.  
  4. For lngIndex = 1 To Len(TESTDATA)
  5.     Select Case Asc(Mid$(TESTDATA, lngIndex, 1))
  6.         Case 97 To 122, 65 To 90, 48 To 57
  7.             strOut = strOut & Mid$(TESTDATA, lngIndex, 1)
  8.     End Select
  9. Next
  10.  
  11. MsgBox strOut