---
description: "Learn more about: Compiler COM Global Functions"
title: "Compiler COM Global Functions"
ms.date: "11/04/2016"
helpviewer_keywords: ["cl.exe compiler, COM support", "COM, compiler support"]
ms.assetid: 74449d26-50a2-47c7-b175-7cf2cf83533e
---
# Compiler COM Global Functions

**Microsoft Specific**

The following routines are available:

|Function|Description|
|--------------|-----------------|
|[_com_raise_error](../cpp/com-raise-error.md)|Throws a [_com_error](../cpp/com-error-class.md) in response to a failure.|
|[_set_com_error_handler](../cpp/set-com-error-handler.md)|Replaces the default function that is used for COM error-handling.|
|[ConvertBSTRToString](../cpp/convertbstrtostring.md)|Converts a `BSTR` value to a `char *`.|
|[ConvertStringToBSTR](../cpp/convertstringtobstr.md)|Converts a `char *` value to a `BSTR`.|

**END Microsoft Specific**

## See also

[Compiler COM Support Classes](../cpp/compiler-com-support-classes.md)<br/>
[Compiler COM Support](../cpp/compiler-com-support.md)