This is a really old post that never made it because I just totally forgot about it until I read Paul Galvin's post http://paulgalvin.spaces.live.com/blog/cns!1CC1EDB3DAA9B8AA!609.entry and I thought it was still worth posting because it's such a common problem and most people don't know that it happens.

So here it goes;

The last few weeks I have learned so many things when working with Josh Medero (Jason Medero brother).  Josh has been helping me out with my InfoPath 2007/InfoPath Forms Services project and he has accidently done a couple of things that I've never done or seen before but that's totally cool because it has helped me learn new things about InfoPath 2007 and InfoPath Forms Services.  As you probably already know this post is about another thing that I learned today.

If you're a developer and have ever worked with InfoPath 2007 forms then you've probably have added a button to the form and have accidentally clicked the "Edit Form Code" button and launched Microsoft Visual Studio Tools for Applications (VSTA) and then closed it because you meant to click the "Rules" button.

When the VSTA window was closed I would have never have thought it would actually create anything and especially if nothing was saved.  For Josh it created an assembly for the form even though no code was added.  He never knew that an assembly was added to the form and I would have never known it but he was having other issues with his form and he sent it to me to open and preview. When I went to preview the form I got the following warning.

The reason that I got the warning was because I don't install VSTA on my laptop but VSTO instead.  After I say the warning message it started to get me wandering what was wrong.  First thing that I did was close InfoPath 2007 and then explored the XSN file and noticed it had a dll in it.  After I noticed this I opened the form backup and went into "Tools" -> "Form Options" and clicked "Programming" category.

The "Programming" category page shows that something was created and once I saw this I just clicked the "Remove Code" button to remove the unwanted assembly.  When I clicked the button the following pop-up came up and I clicked the "Yes" button to remove the code.

After I did these steps I no longer got the warning message when opening the form and Josh problems no longer existed either.  If you really don't plan to do coding in InfoPath with VSTA then I would suggest not to install VSTA that way this problem doesn't occur accidently.

Cheers