Summary

Synopsis

When determining or selecting features in InstallScript, there are a number of behaviors present. The documentation for SdFeatureMult() mentions some of the finer points:

"Default selection settings are cleared when the end user selects a feature or subfeature displayed in the dialog. If the end user clears a feature selection, all of its subfeatures are cleared. Conversely, if the end user clears all of a feature's subfeature selections, the feature's selection is cleared.

...

When a feature is not selected by default, its subfeatures are not selected by default. If all subfeatures of a feature are not selected by default, the parent feature should not be selected by default. See FeatureAddItem for information on default feature and subfeature selection settings. "

In InstallScript MSI Projects, once these selections have been determined, they get passed via the ADDLOCAL property. Note that this invalidates the ability to use Feature Conditions, since the MSI Engine will set the 'Preselected' property and rely on what's explicitly defined in the ADDLOCAL property.

Additional Information

SdFeatureMult

http://helpnet.flexerasoftware.com/installshield19helplib/Subsystems/installshield19langref/helplibrary/LangrefSdFeatureMult.htm

ADDLOCAL Property

http://msdn.microsoft.com/en-us/library/aa367536.aspx