What are the capitalized text identifiers for Win32 error codes called, and how can they be determined programmatically, given an error code?

c#,winapi,error-code,win32exception

For example, in the following error: ERROR_TOO_MANY_OPEN_FILES 4 (0x4) The system cannot open the file. •4 is the error code. •The system cannot open the file. is the message identifier. •ERROR_TOO_MANY_OPEN_FILES is the __________? You are wrong on the last two points. 4 is both the error code and...