ISAPI extensions are applications that run on IIS and have access to all of the functionality provided by IIS. They are implemented as DLLs (aspnet_isapi.dll) and are loaded into a process (w3wp.exe) that is controlled by IIS.
An asp page can be called through ISAPI extension as http://Server_name/ASP.dll/File_name.asp. However, to simplify ASP requests, IIS uses a script mapping that associates ".asp" file name extensions with ASP.dll.
ISAPI extensions can only be developed using C or C++. Visual Studio includes wizards that speed ISAPI development.
An asp page can be called through ISAPI extension as http://Server_name/ASP.dll/File_name.asp. However, to simplify ASP requests, IIS uses a script mapping that associates ".asp" file name extensions with ASP.dll.
ISAPI extensions can only be developed using C or C++. Visual Studio includes wizards that speed ISAPI development.
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