I need help turning these VB functions into SQL Server UDFs.

I'm in the process of trying to learn UDFs but haven't made any headway. Please help so that I can move forward in my learning.

I guess these would be two functions but may only be one.

===FUNCTIONS====

Function CountCSWords(ByVal s) As Integer
'Counts the words in a string that are separated by commas.
Dim WC As Integer, Pos As Integer
If VarType(s) <> 8 Or Len(s) = 0 Then
CountCSWords = 0
Exit Function
End If
WC = 1
Pos = InStr(s, ",")
Do While Pos > 0
WC = WC + 1
Pos = InStr(Pos + 1, s, ",")
Loop
CountCSWords = WC
End Function

Function GetCSWord(ByVal s, Indx As Integer)
'Returns the nth word in a specific field.
Dim WC As Integer, Count As Integer
Dim SPos As Integer, EPos As Integer

WC = CountCSWords(s)
If Indx < 1 Or Indx > WC Then
GetCSWord = Null
Exit Function
End If
Count = 1
SPos = 1
For Count = 2 To Indx
SPos = InStr(SPos, s, ",") + 1
Next Count
EPos = InStr(SPos, s, ",") - 1
If EPos <= 0 Then EPos = Len(s)
GetCSWord = Trim(Mid(s, SPos, EPos - SPos + 1))
End Function

===END===

Thank you.