Sharepoint WorkFlow Approval via Username / Password Authentication

Hello Everyone,

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.
KozelaAsked:
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66866Commented:
Here's an approach, assuming you are using custom task edit form, once the approver hits "Approve" have a "modal popup" that includes a user name and password box. this section is used for connecting to the AD. You can use LDAP query to connect to the AD and authenticate the user.

I know this is not the code level detail that you want, however this can be a good starting point to take it to the next step.
Hope it helps, let me know if you have any questions.
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KozelaAuthor Commented:
I needed more information but the question was a bit vauge and complicated.
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