Okay!
Downloaded the web part and installed it into Excel and created a little mini app (figuring future value, simple FV forumla).
I then went to "Create Webpart" and made the following changes:
Server URL: Pointed to a SITE on my SPS server (not the actual server)~~ex.
I then clicked 'Get Live DocLib Information' and it read in the document libraries on the site... I selected a temp library I created and clicked Create.
I'm sure there can be more customization done at this point, but... this is just to test.
From there, I opened up SPS, went to my site, and imported the DWP that I uploaded to the server. Unfortunately, it wasn't trusted soI had to add it to the configuration files to trust it (not sure I like that... users won't be able to do that) and placed it on the site.
Generally, it gave me just a viewer window of an Excel file... I'm sure you could import the SPS classes into Excel and use VBA to call other web parts... maybe. I don't see how else to interact with existing web parts. You could probably recreate the same thing in VS.NET by placing the spreadsheet as an object, then compiling it as a web part--at least you'd have all of VS.NET to build the connections between that web part and the others.
Not quite sure where to go from here... a cool idea, but I'm stuck on what else to try.
Good luck and if you find a way--please write a FAQ! It looks like an interesting tool and the idea of users being able to create simple spreadsheet webparts is quite appealing (if the token registering issue can be worked around).
Thanks!
-David
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David R. Longnecker
Web Developer
CCNA, MCSA, Network+, A+
Management Information Services
Wichita Public Schools, USD 259