To get a direct link to the ActiveX, you can copy the RSClientPrint.cab from “<Install Driver>:\Program Files\Microsoft SQL Server\MSSQL.<X>\Reporting Services\ReportServer\bin” to any other your own web application. And then use the link http://<site>/<path>/RSClientPrint.cab to get the ActiveX.
To get the ProgID or the CLSID of an ActiveX, we can use the tool oleview.
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