Global Variables

Статья
10/16/2008

The Microsoft run-time library provides the following global variables. These global variables have been deprecated in Visual C++ 2005 for the more secure functional versions, which should be used in place of the global variable (except _pgmptr and _wpgmptr).

Variable	Description
_amblksiz	Controls memory heap granularity
_daylight, _dstbias, _timezone, and _tzname	Adjust for local time; used in some date and time functions
errno, _doserrno, _sys_errlist, and _sys_nerr	Store error codes and related information
_environ, _wenviron	Pointers to arrays of pointers to strings that constitute process environment
_fileinfo	Specifies whether information regarding open files of a process is passed to new processes
_fmode	Sets default file-translation mode
_pctype, _pwctype, _wctype, _mbctype, _mbcasemap	Contain information used by the character classification functions.
_pgmptr, _wpgmptr	Initialized at program startup to value such as program name, filename, relative path, or full path