Compiler COM Support Classes

Microsoft Specific

Standard classes are used to support some of the COM types. The classes are defined in <comdef.h> and the header files generated from the type library.

Class	Purpose
_bstr_t	Wraps the BSTR type to provide useful operators and methods.
_com_error	Defines the error object thrown by _com_raise_error in most failures.
_com_ptr_t	Encapsulates COM interface pointers, and automates the required calls to AddRef, Release, and QueryInterface.
_variant_t	Wraps the VARIANT type to provide useful operators and methods.

END Microsoft Specific

See also

Compiler COM Support
Compiler COM Global Functions
C++ Language Reference