Hi, gstreamer-devel:     You can first run the command: `gst-inspect mp3parse' to check whether this elements exist. If it exists, re-run your program with debug option open: --gst-debug=3. I think you can figure out the problem in debug infos. Eric Zhang <div class="gmail_quote">2008/12/2 川勧桁 <<a href="mailto:lichuanf@neusoft.com">lichuanf@neusoft.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div link="blue" vlink="purple" lang="JA"> <div style=""> Hi, all               Thank you for Eric Zhang's help yesterday.               I download gstreamer, gtk+, glib, libxml2 to config my Visual Studio 2008. But when I run the following code I found something different form it should be.                 GstElement *element;               /* init GStreamer */               gst_init (&argc, &argv);               get_default_registry();               /* create element */               element = gst_element_factory_make("mp3parse", "mp3-parser");               if (!element)               {                             g_print ("Failed to create element of type 'fakesrc'\n");                             return -1;               }               gst_object_unref (GST_OBJECT (element));                 The function gst_element_factory_make("mp3parse", "mp3-parser") return null, and then I called gst_element_factory_find() ,but return null.               Can someone tell me why? Maybe I need to config some plugins but I can not find anything about this from internet specifically about the configuration of Windows environment. I need your help.               Thank you! </div> <pre>--------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Group Ltd., its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. --------------------------------------------------------------------------------------------------- </pre></div> </blockquote></div>