Custom Code is disabled on my form/(it is a workflow form of a sp list workflow process)/ any workaround?

Question

custom code (trying to use C#) is disabled for any button on my form...

I am trying to use that form in the context of a solution structured like this:

data is held in sharepoint lists, and list workflows make up the model layer, and views being shown as workflow process infopath forms. However, the infopath forms in this implementation seem to have custom code buttons disabled. Has anyone implemented something like this that would know what workarounds there are to this problem? If I have to change the implementation, how would you accomplish it?

Thanks.

Answer 1

Out-of-the-box (OOTB) workflow in sharepoint uses Infopath forms. Infopath form templates of types (compatibility) "Sharepoint List Form" and "Workflow Form" are by Microsoft design (or under- mis-design) locked, non-modifiable and do not permit client custom code (from Infopath Designer 2010 in VSTA, Visual Studio for Applications)

So, the answer, impossible and unsupported by design. To the best of my knowledge there are no workarounds except using custom workflow without Infopath forms or with Infopath forms of other custom types.

Update:
I shall not deepen in workarounds since I do not have much experience in them as well workarounds are to steer away from or break OOTB built-in sharepoint model and its functionalities. Then it is not the question on sharepoint

Update2:
I have not hacked/tweaked Infopath forms for workflows but if to elaborate workarounds to limitations of OOTB Infopath forms (those with the use of GUI and wizards) by submitting through CAML XML templates, one might find useful:

• How to submit data from an InfoPath 2010 form to SharePoint 2010 List, in just 10 Steps (CAML)
  example of using client (VSTA) custom code behind. It is unnecessary (or bloated) for that example but instructive if one would like to add more code
• my answer to How to submit data from repeatable table in infopath form to a sharepoint list? on my experience how to follow (break through errors in)
  • S.Y.M. Wong-A-Ton. How to submit the rows of a repeating table in InfoPath to a SharePoint list
    It is how to submit to multiple items of a sharepoint list
• and codeless submit to multiple lists from one Infopath form
  • on the basis of Matt Faus. Add SharePoint List Items with InfoPath (CAML)