[Bug 21589] MacOS error from MIDI SetVolume

http://bugs.winehq.org/show_bug.cgi?id=21589

--- Comment #1 from Jörg Höhle  2010-09-24 06:39:25 CDT ---
I found 2 interesting links on the topic of OSStatus as integer vs. fourcc:

http://zathras.de/angelweb/blog-carbon-for-the-cocoa-guy-oserror.htm
"some CoreAudio developer didn't understand that error codes are supposed to be
numbers, and actually used a FourCharCode for some errors."
http://stackoverflow.com/questions/2196869/how-do-you-convert-an-iphone-osst...

as well as one function which may turn an OSStatus into text:
CoreServices/CarbonCore/Debugging.h
const char* GetMacOSStatusCommentString(OSStatus err);