Export (0) Print
Expand All

CoClassAttribute Class

Specifies the class identifier of a coclass imported from a type library.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)

[AttributeUsageAttribute(AttributeTargets.Interface, Inherited=false)] 
[ComVisibleAttribute(true)] 
public sealed class CoClassAttribute : Attribute
/** @attribute AttributeUsageAttribute(AttributeTargets.Interface, Inherited=false) */ 
/** @attribute ComVisibleAttribute(true) */ 
public final class CoClassAttribute extends Attribute
AttributeUsageAttribute(AttributeTargets.Interface, Inherited=false) 
ComVisibleAttribute(true) 
public final class CoClassAttribute extends Attribute
Not applicable.

You can apply this attribute to coclass interfaces, although the Type Library Importer (Tlbimp.exe) typically applies it for you when it imports a type library.

When Tlbimp.exe imports a coclass, it produces a managed class and an interface to represent the coclass. The coclass interface has the same interface identifier (IID) as the default interface of the original coclass. The imported coclass interface also retains the name of the coclass. Tlbimp.exe appends the original coclass name with "class" to identify the imported class.

You rarely apply this attribute. However, if plan to write source code that produces metadata that closely simulates metadata produced by Tlbimp.exe, you should create a coclass interface for each coclass. Use the name of the original coclass to name the coclass interface and derive it from the default interface. In addition to the CoClassAttribute, you must also apply the System.Runtime.InteropServices.ComImportAttribute and System.Runtime.InteropServices.GuidAttribute to the coclass interface. For additional information about how Tlbimp.exe imports interfaces and coclasses from a type library, see Imported Type Conversion.

System.Object
   System.Attribute
    System.Runtime.InteropServices.CoClassAttribute

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

Community Additions

ADD
Show:
© 2014 Microsoft