Install SQL Express not as prerequisite as followup of custom dialog

[sandeep_anantha]

Hi Guyz,
I am working on an installer which can install either primary or secondary version of our server. I am capturing this through a custom dialog box. My primary installation requires SQL server whereas secondary doesnt. But right now I have SQL server Express as prerequisite. Can I install sql express only when user selects Primary Type of installation. If so how can I do that. :confused:

I read in the posts that, custom bootsrapper could be a solution. But I believe it can only check for dependency such as if dotnet framework is installed. If not install dotnet framework first and then the actual installer.

But my requirement is something different, I dont want to install SQLserver as part of Prerequistes but install it much later depending on user selection of Primary/secondary 😞

Regards,
Sandeep

[sandeep_anantha]

BTW, I am using Instalscript MSI Project

[loyalp]

My solution was to create a function that uses LaunchAppAndWait to execute the sqlexpr.exe, and then placed that function within the dialog sequence where I needed it.