Audio???

Question

Hello everyone, I have an application that works as a dictation recorder. I am using Window Media Encoder to encode the audio into a file. I currently have the encoder working to where you can start recording, pause recording, and stop recording. Then you can playback the audio file. What I need to accomplish now is to stop playback in any spot and begin recording in that position in that one audio file. What I am asking is, is there an interface or component that will allow me to do this, and what approach should I take to accomplish this?????? Thanks for any and all suggestions, Kendal