ITypeInfo Interface
Implemented by
| Used by
| Header filename
|
OLEAUT32.DLL (32-bit systems)
TYPELIB.DLL (16-bit systems)
| Tools that need to access the descriptions of objects contained in type
libraries.
| OLEAUTO.H DLL (32-bit systems)
DISPATCH.H (16-bit systems)
|
This section describes
ITypeInfo, an interface usually used for reading information about objects. For
example, an object browser tool could use
ITypeInfo to extract information about the characteristics and capabilities of objects
from type libraries.
Type information interfaces are intended to describe the parts of the
application that can be called by outside clients, rather than those that might be used
internally to build an application.
The
ITypeInfo interface provides access to the following:
- The set of function descriptions associated with the type; for interfaces,
this contains the set of member functions in the interface.
- The set of data member descriptions associated with the type; for structures,
this contains the set of fields of the type.
- The general attributes of the type such as whether it describes a structure,
an interface, and so forth.
You can use the type description of an
IDispatch interface to implement the
IDispatch interface. See the description of
CreateStdDispatch in Chapter 5, "
Dispatch Interfaces," for more information.
An
ITypeInfo instance provides various information about a type, and is used in different
ways. A compiler could use an
ITypeInfo to compile references to members of the type. A type interface browser could
use it to find information about each member of the type. An
IDispatch implementor could use it to provide automatic delegation of
IDispatch calls to an interface.
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-
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-
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