Obsolete functions

2022-12-02

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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