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.

See Also