Hi guys! I knew that using the directShow library's quartz.dll I can play mp3 or video in a simple program on Visual Basic. So I'm looking for some documentation about this library and its use to develop a Media Player,like WinAmp; Could you help me please? Do you know any site that explain how to use this library? But please avoid to remember me that I can search on msdn's site...I already watched that guide and it's too big and too disperive. Thank you very much !;)