Convert numbers to words in Excel

I can't find it for excel, but this might help:
Convert numbers into words  (not excel, but it works)

Visual Basic conversion

• Excel: Convert Numbers to Words/Text in VB
• Excel: Convert Currency Number to Words/Text. User Defined/Custom Formula/Function in VB

Vaguely related material

• The Excel (2003) tutorial And the total is - Audio course: So that's how! Great Excel features - Microsoft Office
• Spreadsheet Applications Challenges - Wikiversity