The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Compiler COM Support


The latest version of this topic can be found at Compiler COM Support.

Microsoft Specific
The Visual C++ compiler can directly read component object model (COM) type libraries and translate the contents into C++ source code that can be included in the compilation. Language extensions are available to facilitate COM programming on the client side.

By using the #import preprocessor directive, the compiler can read a type library and convert it into a C++ header file that describes the COM interfaces as classes. A set of #import attributes is available for user control of the content for the resulting type library header files.

You can use the __declspec extended attribute uuid to assign a globally unique identifier (GUID) to a COM object. The keyword __uuidof can be used to extract the GUID associated with a COM object. Another __declspec attribute, property, can be used to specify the get and set methods for a data member of a COM object.

A set of COM support global functions and classes is provided to support the VARIANT and BSTR types, implement smart pointers, and encapsulate the error object thrown by _com_raise_error:

Compiler COM Support Classes
Compiler COM Global Functions