Method to read FSUIPC install location?

[NovemberUniform]

Hi, 

I'm thinking about writing a simple installer for my Lua plug-in.

If I remember correctly, the user can freely choose an install location for FSUIPC7. Is there a way to read that location, maybe from the registry? 

Thanks in advance. 

[John Dowson]

You can read the installation location from the registry, from InstallDir under HKLM Software\Microsoft\Windows\CurrentVersion\Uninstall\FSUIPC7

But note that lua files don't necessarily go in the installation folder. If the LuaPath ini parameter is set (under [LuaFiles]), that will be used instead, so you would also need to read that. LuaPath can contain a relative or full path specification.

John

[NovemberUniform]

Thanks John! Much appreciated. 

[NovemberUniform]

On 11/3/2022 at 11:20 AM, John Dowson said:

You can read the installation location from the registry, from InstallDir under HKLM Software\Microsoft\Windows\CurrentVersion\Uninstall\FSUIPC7

But note that lua files don't necessarily go in the installation folder. If the LuaPath ini parameter is set (under [LuaFiles]), that will be used instead, so you would also need to read that. LuaPath can contain a relative or full path specification.

John

Hi John,

I need to get back to you on this. On my Windows 11 installation the path is this: "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\FSUIPC7". Is this to be expected? Do you know what are the different path versions from Win7 until Win11 (both 32 and 64bit versions)? Thanks!

[John Dowson]

The installer just writes (and reads) the key as I specified. This is for FSUIPC6 and FSUIPC7 only, which are both  64-bit, so 32-bit OS (Win7) is not supported. Any translation to the registry path must be done by windows. I suggest you just try reading the key as specified.

John

[NovemberUniform]

38 minutes ago, John Dowson said:

I suggest you just try reading the key as specified.

I can only read it succesfully (on my PC), if I use the path I have shown. It's not working with the path you provided.

[John Dowson]

That is strange... the installer writes and reads from that path...

I have just checked my registry and I also have the entries under the WOW6432Node, as you say. However, the installer still reads/writes to that location I specified. Strange.
I suspect this is some sort of voodoo that windows uses to split registry entries for 32 and 64-bit applications. Just use whatever works for you.

John

[NovemberUniform]

Can you please repeat the exact string of the path you are looking for. 

[John Dowson]

22 hours ago, NovemberUniform said:

Can you please repeat the exact string of the path you are looking for. 

I already did - it is this:

On 11/3/2022 at 11:20 AM, John Dowson said:

from InstallDir under HKLM Software\Microsoft\Windows\CurrentVersion\Uninstall\FSUIPC7

Maybe the exact location is determined by the installer API I am using, which is NSIS. I don't know how that resolves the input to the exact registry location, but, as O said, just use what you find and that should be sufficient. I suspect that the location I am using will be resolved to the WOW6432Node location dor all installs (as they are all 64-bit), so just use that, Otherwise, fig into the NSIS registry facilities, but I don't see why you just don't use what you see....

John