New Version 2015.08.18! The main features are animations effects and resize bars. Controls can optionally animate sliding open and sliding closed. Resize bars fade-in and fade-out if the mouse is nearby. All C# source code files are in the "src" folder in the zip file.


This project is intended for .NET developers.

This project provides the source code for a user-interface control commonly referred to as an accordion. The headers open when clicked and display more input fields. Clicking an open header will close it so that its input fields become hidden.


  • Controls animate with slide-open and slide-closed effects.
  • Resize bars appear when the mouse is nearby.
  • Demo program in zip file to play around with the options.
  • Tool box context menu gives user the option to open/close all controls, and lock/unlock control heights.

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Intended Audience


User Interface

Win32 (MS Windows)

Programming Language