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)
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 Assembly Registration Tool (Regasm.exe) 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.
Imports System Imports System.Runtime.InteropServices Public Class MyClassThatNeedsToRegister <ComRegisterFunctionAttribute()> Public Shared Sub _ RegisterFunction(t As Type) 'Insert code here. End Sub <ComUnregisterFunctionAttribute()> Public Shared Sub _ UnregisterFunction(t As Type) 'Insert code here. End Sub End Class
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.