Dear: I want to develop a plugin for realplayer to support my own data type audio files.When I read the realsystem sdk doc, I found the description not very clear.So I have some questions and wish you help me :) The first question is that the way to use the realsystem sdk to develop the plugin is practicable.And if it is practicable, what is it's structure? For example, using file format plug_in and rendering plug_in or something else.So I hope you can give me a clear mind by concise words. The second question is that I compile and build some of the SDK samples into DLL files but I can not make the plugins used by realplayer even the simplest sample "helloworld", in the directory "rmasdk_6_0 / samples / intro / hellowld ", How can I make IT Works? (i Copy The DLL File Into" Program Files / Real / RealPlayer / Plugins "But it doesn't work) i Also See" RMASDK_6_0 / Samples / INTRO / FILEFMT1 "and" RMASDK_6_0 / Samples / Intro / Ff1rendr "and the Same" Happened :(. Could you please tell me how to use the dll fil ES? THANKS A LOT