Filtering Files in Open dialog ( Inputfile) in ASP.Net

Dear All, Is it possible to filter the files to be selected in a Input File control in ASP.Net 2005. Or can we use Open dialog control in ASP page, is it possible. I need the filter the files such as only PDF files, or only .doc or .txt etc., Please help me to solve this problem. Regards Mukilan.P.S

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