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This interface provides methods for accessing a library of type descriptions.
The data that describes a set of objects is stored in a type library. A type library can be a stand-alone binary file (.tlb), a resource in a dynamic link library or executable file (.dll or .exe), or part of a compound document file.
The system registry contains a list of all the installed type libraries.
This interface supports the following:
- Generalized containment for type information. ITypeLib allows iteration over the type descriptions contained in the library.
- Global functions and data. A type library can contain descriptions of a set of modules, each of which is the equivalent of a C or C++ source file that exports data and functions. The type library supports compiling references to the exported data and functions.
- General information, including a user-readable name for the library and help for the library as a whole.
Methods
The following table shows the methods for this interface in alphabetical order. Like all COM interfaces, this interface inherits the methods for the IUnknown interface.
| Method | Description |
|---|---|
| ITypeLib::FindName | This method finds occurrences of a type description in a type library. This may be used to verify that a name exists in a type library. |
| ITypeLib::GetDocumentation | This method retrieves the library's documentation string, the complete Help file name and path, and the context identifier for the library Help topic. |
| ITypeLib::GetLibAttr | This method retrieves the structure that contains the library's attributes. |
| ITypeLib::GetTypeComp | This method retrieves a pointer to the ITypeComp for a type library. This enables a client compiler to bind to the library's types, variables, constants, and global functions. |
| ITypeLib::GetTypeInfo | This method retrieves the specified type description in the library. |
| ITypeLib::GetTypeInfoCount | This method retrieves the number of type descriptions in the library. |
| ITypeLib::GetTypeInfoOfGuid | This method retrieves the type description that corresponds to the specified globally unique identifier (GUID). |
| ITypeLib::GetTypeInfoType | This method retrieves the type of a type description. |
| ITypeLib::IsName | This method indicates whether a passed-in string contains the name of a type or a member described in the library. |
| ITypeLib::ReleaseTLibAttr | This method releases the TLIBATTR originally obtained from GetLibAttr. |
Requirements
OS Versions: Windows CE 2.0 and later.
Header: Oaidl.h, Oaidl.idl.
Link Library: Oleaut32.lib, Uuid.lib.
See Also
Automation Interfaces | ITypeComp | TLIBATTR | IUnknown
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