---
description: "Learn more about: _com_raise_error"
title: "_com_raise_error"
ms.date: "11/04/2016"
f1_keywords: ["_com_raise_error"]
helpviewer_keywords: ["_com_raise_error function"]
ms.assetid: a98226c2-c3fe-44f1-8ff5-85863de11cd6
---
# _com_raise_error

**Microsoft Specific**

Throws a [_com_error](../cpp/com-error-class.md) in response to a failure.

## Syntax

```cpp
void __stdcall _com_raise_error(
   HRESULT hr,
   IErrorInfo* perrinfo = 0
);
```

#### Parameters

*hr*<br/>
HRESULT information.

*perrinfo*<br/>
`IErrorInfo` object.

## Remarks

**_com_raise_error**, which is defined in \<comdef.h>, can be replaced by a user-written version of the same name and prototype. This could be done if you want to use `#import` but do not want to use C++ exception handling. In that case, a user version of **_com_raise_error** might decide to do a `longjmp` or display a message box and halt. The user version should not return, though, because the compiler COM support code does not expect it to return.

You can also use [_set_com_error_handler](../cpp/set-com-error-handler.md) to replace the default error-handling function.

By default, **_com_raise_error** is defined as follows:

```cpp
void __stdcall _com_raise_error(HRESULT hr, IErrorInfo* perrinfo) {
   throw _com_error(hr, perrinfo);
}
```

**END Microsoft Specific**

## Requirements

**Header:** \<comdef.h>

**Lib:** If the **wchar_t is Native Type** compiler option is on, use comsuppw.lib or comsuppwd.lib. If **wchar_t is Native Type** is off, use comsupp.lib. For more information, see [/Zc:wchar_t (wchar_t Is Native Type)](../build/reference/zc-wchar-t-wchar-t-is-native-type.md).

## See also

[Compiler COM Global Functions](../cpp/compiler-com-global-functions.md)<br/>
[_set_com_error_handler](../cpp/set-com-error-handler.md)