'encryption function :
Public Function Encrypt(ByVal Plain As String)
For I=1 To Len(Plain)
Letter=Mid(Plain,I,1)
Mid(Plain,I,1)=Chr(Asc(Letter)+1)
Next
Encrypt = Plain
End Sub
Public Function Decrypt(ByVal Encrypted As String)
For I=1 to Len(Encrypted)
Letter=Mid(Encrypted,I,1)...