The sndAlias macro is not supported in Windows 95. In addition, the SND_ALIAS and SND_ALIAS_ID values for the PlaySound function are not supported in Windows 95.
The Windows 95 multimedia functions are not designed to be used by two or more threads in the same process. Although most multimedia functions will work if they are called by multiple threads, some are likely to fail. Functions that are particularly likely to fail include PlaySound, any of the functions that prepare or unprepare headers, and any of the open and close functions. PlaySound can never be used simultaneously by multiple threads in the same process. The functions that prepare or unprepare headers and the open and close functions can be used simultaneously by multiple threads in the same process, but only if they do not pass the same structure.