How to add a lookup field to workflow custom task form?

Question

I'm trying to create a task in a workflow which collects data from user with sp designer 2010. Some predefined available type for custom form fields single line of text, choice and such things. I want to add a custom type which is a drop-down list, and fill it with a look up site column (look up in other lists in site ).

Is there any possibility to do so?

Answer 1

SharePoint OOTB doesn't have methods for doing this in SharePoint Designer. The "official" way is to use InfoPath and Visual Studio to create a Visual Studio workflow with an InfoPath workflow form.

With that said, however, this blog post shows one way to hack around this in SharePoint Designer: http://generation12.wordpress.com/2009/03/12/using-lookup-fields-in-workflow-initiation-forms/