Add-in is an additional plug-in which can used for supporting the different application environments.
QuickTest add-ins help us to create and run tests and components on applications of development environments. After you load an add-in, you can record and run tests or components on applications in the corresponding development environment, similar to the way you do with any other application.
You can install QuickTest add-ins when you install QuickTest Professional, or you can install the add-ins at a later time by running the installation again in Modify mode.
QuickTest add-ins help us to create and run tests and components on applications of development environments. After you load an add-in, you can record and run tests or components on applications in the corresponding development environment, similar to the way you do with any other application.
You can install QuickTest add-ins when you install QuickTest Professional, or you can install the add-ins at a later time by running the installation again in Modify mode.