Displaying special characters (card suits)

so im using the following code (snippet):

-----------------
Dim Retext As String
If num >= 39 And num <= 51 Then
Retext = System.Convert.ToChar(&H2660)
End If

Return Retext
-----------------
to display the suits of cards for a poker simulation. This works just fine in Windows XP. When i run the executable, i can see the heart, spade, diamond, and clubs characters just fine.
However, when i run the same executable in Windows 2000, all i get is a bold pipe character.

Any reason why different versions of Windows would convert hex characters differently?

thanks