Calling MsiGetFeatureState from InstallSkript

[Barbara]

My Installation uses CheckBoxes to select which components should be installed (Conditions are set on the components via this checkboxes). Now in MaintenanceMode -> Change I like that the user can change the installed components and present him the CheckBoxes dialog again. Befor this, I call MsiGetFeatureState from InstallSkript in order to see which components are already installed. But the function alsway returns INSTALLSTATE_LOCAL as install state and INSTALLSTATE_UNKNOWN as action state. the function is called after CostFinalize.
Any suggestions ?

Can I use MsiSetFeatureState to install a new component when the user selected it in maintenance mode ?

Thank you

Barbara