The FeatureCost property of the Session object returns the total amount of disk space (in units of 512 bytes) required by the specified feature and its parent features (up to the root of the Feature table). For each feature, the total cost is made up of the disk costs attributed to every component linked to the feature.
This property is read-only.
propVal = Session.FeatureCost
If the property fails, you can obtain extended error information by using the LastErrorRecord method.
||Windows Installer 5.0 on Windows Server 2012, Windows 8, Windows Server 2008 R2 or Windows 7. Windows Installer 4.0 or Windows Installer 4.5 on Windows Server 2008 or Windows Vista. Windows Installer on Windows Server 2003 or Windows XP
||IID_ISession is defined as 000C109E-0000-0000-C000-000000000046