I was wondering if you guys can point me in the right direction. I would like to build a custom SharePoint approval workflow. I have plenty of examples relating to the basic approval workflow. My question is, how can I force the approver to reauthenticate when they hit the approve button? In other words, I need a username and password promt to be displayed prior to commiting the approval in the workflow. The username and password should correlate with the one in Active directory. If anyone can share any example C# code, to add to the workflow in Visual Studio 2008, it would be greatly appreciated. Thanks for the help in advanced.