Populate TextBox with Inline Call

System

I'm trying to populate a textbox based on a inline call to my database in order to generate a unique id - does anyone know 1) - if a text box can be populated from an inline call and 2) what is the syntax - the most obvious choice below didn't work:

<text>
<inline command="d:/iw-home/Interwoven/TeamSite/iw-perl/bin/iwperl.exe d:/iw-home/Interwoven/TeamSite/httpd/iw-bin/inline_get_id.ipl"/>
</text>