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Update _SCL_SECURE_NO_WARNINGS topic #5441

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33 changes: 19 additions & 14 deletions docs/standard-library/scl-secure-no-warnings.md
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---
description: "Learn more about: _SCL_SECURE_NO_WARNINGS"
title: "_SCL_SECURE_NO_WARNINGS"
ms.date: "11/04/2016"
description: "Learn more about: _SCL_SECURE_NO_WARNINGS"
ms.date: 11/04/2016
f1_keywords: ["_SCL_SECURE_NO_DEPRECATE", "_SCL_SECURE_NO_WARNINGS"]
helpviewer_keywords: ["_SCL_SECURE_NO_DEPRECATE", "_SCL_SECURE_NO_WARNINGS"]
ms.assetid: ef0ddea9-7c62-4b53-8b64-5f4fd369776f
---
# _SCL_SECURE_NO_WARNINGS
# `_SCL_SECURE_NO_WARNINGS`

Calling any of the potentially unsafe methods in the C++ Standard Library results in [Compiler Warning (level 3) C4996](../error-messages/compiler-warnings/compiler-warning-level-3-c4996.md). To disable this warning, define the macro _SCL_SECURE_NO_WARNINGS in your code:
Calling any of the potentially unsafe methods in the C++ Standard Library results in [Compiler Warning (level 3) C4996](../error-messages/compiler-warnings/compiler-warning-level-3-c4996.md). To disable this warning, define the macro `_SCL_SECURE_NO_WARNINGS` in your code:

```cpp
#define _SCL_SECURE_NO_WARNINGS
Expand All @@ -20,26 +19,32 @@ If you use precompiled headers, put this directive in your precompiled header fi

Other ways to disable warning C4996 include:

- Using the [/D (Preprocessor Definitions)](../build/reference/d-preprocessor-definitions.md) compiler option:
- Using the [`/D` (Preprocessor Definitions)](../build/reference/d-preprocessor-definitions.md) compiler option:

> cl /D_SCL_SECURE_NO_WARNINGS [other compiler options] myfile.cpp
```cmd
cl /D_SCL_SECURE_NO_WARNINGS [other compiler options] myfile.cpp
```

- Using the [/w](../build/reference/compiler-option-warning-level.md) compiler option:
- Using the [`/w`](../build/reference/compiler-option-warning-level.md) compiler option:

> cl /wd4996 [other compiler options] myfile.cpp
```cmd
cl /wd4996 [other compiler options] myfile.cpp
```

- Using the [#pragma warning](../preprocessor/warning.md) directive:
- Using the [`#pragma warning`](../preprocessor/warning.md) directive:

```cpp
#pragma warning(disable:4996)
```

Also, you can manually change the level of warning C4996 with the **/w\<l>\<n>** compiler option. For example, to set warning C4996 to level 4:
Also, you can manually change the level of warning C4996 with the `/w<l><n>` compiler option. For example, to set warning C4996 to level 4:

> cl /w44996 [other compiler options] myfile.cpp
```cmd
cl /w44996 [other compiler options] myfile.cpp
```

For more information, see [/w, /W0, /W1, /W2, /W3, /W4, /w1, /w2, /w3, /w4, /Wall, /wd, /we, /wo, /Wv, /WX (Warning Level)](../build/reference/compiler-option-warning-level.md).
For more information, see [`/w`, `/W0`, `/W1`, `/W2`, `/W3`, `/W4`, `/w1`, `/w2`, `/w3`, `/w4`, `/Wall`, `/wd`, `/we`, `/wo`, `/Wv`, `/WX` (Warning Level)](../build/reference/compiler-option-warning-level.md).

## See also

[Safe Libraries: C++ Standard Library](../standard-library/safe-libraries-cpp-standard-library.md)
[Safe Libraries: C++ Standard Library](safe-libraries-cpp-standard-library.md)