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title: "_com_raise_error | Microsoft Docs"
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---
# _com_raise_error
**Microsoft Specific**  
  
 Throws a [_com_error](../cpp/com-error-class.md) in response to a failure.  
  
## Syntax  
  
```  
  
      void __stdcall _com_raise_error(  
   HRESULT hr,  
   IErrorInfo* perrinfo = 0  
);  
```  
  
#### Parameters  
 `hr`  
 `HRESULT` information.  
  
 `perrinfo`  
 **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:  
  
```  
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)   
 [_set_com_error_handler](../cpp/set-com-error-handler.md)