(This is a series of posts covering how to include a WinForm app inside a SharePoint 2007 application, which allows users to upload batches of files to a SharePoint document library. For further info, please see Posts One, Two, and Three. All of the code can be downloaded in Post Two.) Just a quick review of our solution, as detailed in the first three posts of this series: a Custom Action adds a menu choice to a document library’s Upload menu, which links to a Windows Form application deployed using ......