How to get the error message other than this error number?

Code:
If Err.Number = 68 Then
MsgBox "Pastikan anda telah memasukkan CD anda", vbCritical, "Kesilapan"
frmSpatial.Drive1.Drive = Text3.Text
frmSpatial.Dir1.Path = Text3.Text
frmSpatial.File1.Path = frmSpatial.Dir1.Path
Exit Sub
End If