Need a web application (aspx page) that will: 1. Be able to accept a powerpoint (ppt) file upload to the web server via an aspx page. 2. Validate the format of the uploaded file, and check that the size of the ppt meets certain criteria (pixel height/width) before conversion to swf. 3. Conversion of uploaded ppt to swf file occurs on server and the created swf is presented to user for download. 4. I am looking to leverage the least expensive sdk/library, open source would be best if...