Out of Order

There are a few dialog boxes that don’t fit into the normal sequence of wizard pages but represent errors or similar out-of-sequence conditions. We can specify them using the OnExit attribute in the Show tag used for scheduling. The value can be success, cancel, error or suspend:

<InstallUISequence>
  <Show Dialog="FatalError" OnExit="error" />
  <Show Dialog="UserExit" OnExit="cancel" />
  <Show Dialog="ExitDialog" OnExit="success" />
  ...
</InstallUISequence>