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Update wctomb-s-wctomb-s-l.md #4463

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6 changes: 4 additions & 2 deletions docs/c-runtime-library/reference/wctomb-s-wctomb-s-l.md
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Expand Up @@ -44,7 +44,7 @@ The address of a multibyte character.
Size of the buffer *`mbchar`*.

*`wchar`*\
A wide character.
The wide character to convert.

*`locale`*\
The locale to use.
Expand All @@ -60,9 +60,11 @@ Error Conditions
| `NULL` | >0 | `EINVAL` | not modified |
| any | >`INT_MAX` | `EINVAL` | not modified |
| any | too small | `EINVAL` | not modified |

If any of the above error conditions occurs, the invalid parameter handler is invoked, as described in [Parameter validation](../parameter-validation.md). If execution is allowed to continue, `wctomb` returns `EINVAL` and sets `errno` to `EINVAL`.

The return value [`EILSEQ`](../errno-constants.md) indicates that the value passed via the parameter `wchar` is not a valid wide character.

## Remarks

The **`wctomb_s`** function converts its *`wchar`* argument to the corresponding multibyte character and stores the result at *`mbchar`*. You can call the function from any point in any program.
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