ActiveWinamp

ActiveWinamp is a powerful automation plugin for Winamp. Completely free and open source. The ActiveWinamp plugin exposes a lot of Winamp functionality through COM / ActiveX. You may use this to write Visual Basic, C# .NET, C++ or any other applications which interact with Winamp.

You can even automate Winamp internally through the use of VBscript (similar to VBA in Office applications). Write scripts that can be executed from the playlist, "Send To" menu or hot keys, or from external scripts and programs. Check out the Wiki and the included examples for an idea of what is possible with this powerful plugin.

Effectively, ActiveWinamp lets you create powerful plugins for Winamp with nothing more than a few lines of VBscript. Although, you can also use other languages and control Winamp in anyway you like. It is similar to the VBA feature in Microsoft Office Applications.