SharePoint link

SharePoint Artical

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Code on InfoPath:
http://stackoverflow.com/questions/2378995/programmatically-save-a-browser-infopath-form-to-its-source-list

http://msdn.microsoft.com/en-us/library/gg435971.aspx

http://www.sharepointfix.com/2009/12/infopath-2007-form-and-nintex-workflows.html