Вы можете создать метод, описанный ниже, для его достижения.
Private Function ConvertIntToString(ByVal value As Integer) As String
Dim intToString As String = value.ToString()
Dim result As String = String.Empty
For i As Integer = 0 To intToString.Length - 1
If i <> 0 Then result += " "
Select Case intToString(i)
Case "0"c
result += "Zero"
Case "1"c
result += "One"
Case "2"c
result += "Two"
End Select
Next
Return result
End Function