How does custom action communicate with Condition

[wisonli]

I am now working on a Custom Action retrieving certain register entry from system, then install proper component according to the register entry's value.

I am managed to write a vbs to retrieve register entry:
function readRegistry()

Dim WshShell
Set WshShell = CreateObject("WScript.Shell")
notesPath = WshShell.RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Lotus\Notes\Path")
end function

And I know how to use the Condition to control the install process of specific component.

My question is, for the value I retrieved by the vbs, the "notesPath", how can I use this value to set up a Condition to control the install process of specific component? In other words, how does the Custom Action pass value to Condition.

Thank you for any suggestion.

[Matthias1967]

Your Custom Action must assign this value to a property, then Windows Installer can use this property in conditions.