PowUpload classes have all methods and properties of the .NET Framework HttpFileCollection and HttpPostedFile classes and some own ones. Signature of common members is the same. You can easily replace the code written for built-in upload support to use PowUpload control.
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Used files: Bin\Element-IT.PowUpload.dll, Web.Config, ReplaceCode.htm, ReplaceCode.aspx, Styles.css [Optional]