Obsolete functions

Certain library functions are obsolete and have more recent equivalents. We recommend you change these functions to the updated versions. Other obsolete functions have been removed from the CRT. This article lists the functions deprecated as obsolete, and the functions removed in a particular version of Visual Studio.

Deprecated as obsolete in Visual Studio 2015

Obsolete function	Alternative
is_wctype	iswctype
_loaddll	LoadLibrary, LoadLibraryEx, or LoadPackagedLibrary
_unloaddll	FreeLibrary
_getdllprocaddr	GetProcAddress
_seterrormode	SetErrorMode
_beep	Beep
_sleep	Sleep
_getsystime	GetLocalTime
_setsystime	SetLocalTime

Removed from the CRT in Visual Studio 2015

Obsolete function	Alternative
_cgets, _cgetws	_cgets_s, _cgetws_s
gets, _getws	gets_s, _getws_s
_get_output_format	None
_heapadd	None
_heapset	None
inp, inpw, _inp, _inpw, _inpd	None
outp, outpw, _outp, _outpw, _outpd	None
_set_output_format	None

Removed from the CRT in earlier versions of Visual Studio

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