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Writing Data-Driven Custom Actions

Whenever Windows Installer’s built-in actions do not suffice to perform a specific task, a Custom Action needs to be written. Needless to say, Custom Actions, can be a bit tricky – not only can they be laborious to write and cumbersome to debug, they also run the risk of interfering with Windows Installer’s declarative, transactional way of performing installs. It is not really surprising that Windows Installer therefore more or less discourages the use of Custom Actions unless it is absolutely necessary.

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