Windows uses a common error code system across most APIs (not sure about WMME wave* functions). PortAudio error reporting could be improved by providing standard functions for translating these error codes into PA errors.

Solution: create a pa_win_error.c/h module with routines for translating Windows error codes to PA error codes. Including support for translating unexpected host errors.

pa_win_wmme.c contains a function PaMme_SetLastSystemError that could be used as a basis.


Function signature would be something like:

/**
 Convert a Windows error code into a PaError. Sets the host-api specific error
 information if needed.

 @param hostApiType The calling host api type. Used when reporting paUnanticipatedHostError

 @param winError A Windows error code.
*/
PaError PaWinUtil_ConvertSystemError( PaHostApiTypeId hostApiType, DWORD winError );