Foreign datum surface in Pro/ToolKit

[DefCon5]

Hello. We have a user who wants to know:

<div id="post_message_307">Hi all,
Is there any possibility of creating new
surfaces for which i have mathematical representation of an analytic surface
through Pro/Toolkit The inbuilt surfaces are not able to meet my requirement.
May i know how can i make use of foreign datum surface creation in
this?

Thanks</div>