CHttpModule::Dispose Method

IIS 7.0

Releases all resources used by the current instance of the CHttpModule class.

virtual VOID Dispose(

This method takes no parameters.

IIS automatically calls the Dispose method at the end of the request.


Typically you create a class that is derived from CHttpModule by using the C++ new operator. Classes that were created with the new operator do not need to implement the Dispose method to perform any cleanup at the end of the request.


The following example demonstrates how to create a simple "Hello World" HTTP module. The module defines an exported RegisterModule function that passes an instance of an IHttpModuleFactory interface to the IHttpModuleRegistrationInfo::SetRequestNotifications method and registers for the RQ_BEGIN_REQUEST notification. IIS uses the IHttpModuleFactory::GetHttpModule method to create an instance of a CHttpModule class and returns a success status. IIS also uses the IHttpModuleFactory::Terminate method to remove the factory from memory.

When an RQ_BEGIN_REQUEST notification occurs, IIS calls the module's CHttpModule::OnBeginRequest method to process the current request. OnBeginRequest clears the response buffer and modifies the MIME type for the response. The method then creates a data chunk that contains a "Hello World" string and returns the string to a Web client. Finally, the module returns RQ_NOTIFICATION_FINISH_REQUEST to notify IIS that all notifications are finished and then exits.

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.





  • IIS 7.0 on Windows Vista

  • IIS 7.5 on Windows 7

  • IIS 8.0 on Windows 8

  • IIS 10.0 on Windows 10


  • IIS 7.0 on Windows Server 2008

  • IIS 7.5 on Windows Server 2008 R2

  • IIS 8.0 on Windows Server 2012

  • IIS 8.5 on Windows Server 2012 R2

  • IIS 10.0 on Windows Server 2016 Technical Preview


  • IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0

  • IIS Express 7.5, IIS Express 8.0, IIS Express 10.0