The Multimedia Development Kit includes the following services and tools to aid in debugging applications that use the Multimedia extensions:
A debugging version of the Multimedia Extensions 1.0 software that displays commands sent to MCI and performs error checking unavailable in the retail version.
A Multimedia extensions function, OutputDebugStr that can send messages to a debugging monitor.
These services supplement the debugging services and tools provided with the Windows Software Development Kit. See the Tools manual provided with the Windows SDK for information about using the SDK debugging tools.