$INSTDIR finding

Hello,

I use NSIS 2.0 for create an installer which deploy in an $INSTDIR choosed by user some files (.nsi file attached).
This path is also wroted in a registry key.

I have to create a new installer file which will deploy the same files (modified in structure). This will be an upgrade of the old program. For this purpose, I need to keep the same $INSTDIR path user choosed.

I had runned some tests and I notice the new installer automatically choosed the correct path on my local machine.

My question is: does the new installer will read by himself the registry to find the correct path to the $INSTDIR automatically or I have to wrote a new module to read/compare registry and to sugest to the user the correct path?

Hope I was clear and many appreciation for your work in this forum.

The installer doesn't automatically read the registry and gets $INSTDIR from it. You must use InstallDirRegKey to tell it where to where to get the value.

Woe,
The script you posted does use the command that Kichik named, so it will read the registry and find the previous installation directory.

Originally posted by demiller9
Woe,
The script you posted does use the command that Kichik named, so it will read the registry and find the previous installation directory.

Thanks a lot for reply.

I think is like @demiller9 said. I supose is similar with the language choosing - if I do not uninstall the program and re-install the files over the oldest ones, the installer process trespass the language choosing step - I presume because he already read the language registry.

I think the similar will happend with the path of directory used for install which has a similar registry wroted in the previous install process.