Hello,
You can add a
"SetProperty" published event on one of the controls from your installation chain. However please keep in mind that the InstallUISequence will be skipped when installing silently, hence this operation will not occur.
If this private property is defined in the InstallExecuteSequence, you can use a
"Property Set with Formatted" custom action or set it from within your own.
All the best,
Mihai