HOW TO: Implement a custom iFilter in SharePoint 2013

This post is a contribution from Kevin Jacob Kurian, an engineer with the SharePoint Developer Support team. In SharePoint 2010, we had an option of implementing custom iFilter for files (like PDFs) so that we can see the search results from these files as well.  SharePoint 2013 has this feature of crawling PDF files in-built.  So, the need for developing a custom iFilter is rare but still if you want to develop one (say for a DWG file) in SharePoint 2013, then the following steps will...(read more)