The following information is from the Sharpamp website:

By Daniel15 - http://dan.cx/

https://github.com/Daniel15/Sharpamp

Download: https://github.com/Daniel15/Sharpamp/releases/download/release-0.1.0/Sharpamp.0.1.Beta.exe

Sharpamp allows you to easily write Winamp plugins in C#. It provides a library for access to the Winamp API, and a Visual Studio template for creating Winamp plugins. It requires you to have Visual Studio 2005, 2008 or 2010. Take a look at the Getting Started article to see how simple it is to get started :)

It supports some basic functionality of the Winamp API, with more coming in the future:
Intellisense Menu

Handling song changes uses standard C# events, and is as simple as:

public override void Initialize()
{
	Winamp.SongChanged += Winamp_SongChanged;
}

void Winamp_SongChanged(object sender, Daniel15.Sharpamp.SongChangedEventArgs e)
{
	MessageBox.Show("The song changed to " + e.Song.Title);
}

A demonstration of what you can do with Sharpamp is shown in the HelloWorldGUI sample (included in the download)

  • Visual Studio 2005, 2008 or 2010
    • C# and C++ both have to be installed
  • Winamp

Sharpamp is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Sharpamp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with Sharpamp. If not, see http://www.gnu.org/licenses/.