Windows Installer has a long list of predefined error messages and there are many scenarios in which we would need to define Custom error messages for Custom Actions.
Windows Installer suggests the following Tips while creating Custom Error Messages.
- The error number must be a non-negative integer.
- The range from 25000 to 30000 is reserved for errors from custom actions. Authors of custom actions may use this range for their custom actions.
However InstallShield users have to be extra carefull to exclude the error codes ranging from 27500 to 27554, which is already being used by recent versions of InstallShield (verified in IS 12, 2009 & 2010) for IIS, Database, COM+, XML etc., related functionality.
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