ComUnregisterFunctionAttribute Class
Specifies the method to call when you unregister an assembly for use from COM; this allows for the execution of user-written code during the unregistration process.
Assembly: mscorlib (in mscorlib.dll)
The ComUnregisterFunctionAttribute type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | ComUnregisterFunctionAttribute | Initializes a new instance of the ComUnregisterFunctionAttribute class. |
| Name | Description | |
|---|---|---|
![]() | Equals | Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Returns the hash code for this instance. (Inherited from Attribute.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | IsDefaultAttribute | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.) |
![]() | Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | _Attribute::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfo | Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.) |
![]() ![]() | _Attribute::Invoke | Provides access to properties and methods exposed by an object. (Inherited from Attribute.) |
You can apply this attribute to methods.
ComUnregisterFunctionAttribute enables you to add code that reverses the operations performed by a registration method. If you apply the ComRegisterFunctionAttribute to provide a registration method, you must also provide an unregistration method to reverse the operations done in the registration method. You can have only one unregistration method for a class.
The common language runtime calls the method with this attribute when its containing assembly is unregistered (directly or indirectly) with the Regasm.exe (Assembly Registration Tool) or through the RegistrationServices::UnregisterAssembly API method. Methods with this attribute can have any visibility (public, private, and so on), but must be static and must take a single Type parameter for the Type to unregister.
The following example demonstrates applying ComRegisterFunctionAttribute and ComUnregisterFunctionAttribute to methods with the appropriate signature.
using namespace System; using namespace System::Runtime::InteropServices; public ref class MyClassThatNeedsToRegister { public: [ComRegisterFunctionAttribute] static void RegisterFunction( Type^ t ) { //Insert code here. } [ComUnregisterFunctionAttribute] static void UnregisterFunction( Type^ t ) { //Insert code here. } };
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
