The MameInterop SDK is a collection of source code projects to help with writing applications that communicate with Mame using it's built in output system developed by the MAME Team.

The communication with Mame is achieved by using Mame.dll. Mame.dll is based off the ledutil.c code example included in the Mame archive. It demonstrates reading outputs from Mame using the Windows messaging system. Mame.dll communicates with Mame using a hidden Window that receives messages and sends them to the application attached to the dll using callback functions.