Installation directory

[MarcL]

Hi all

I have searched through the forum, asked google and read through the NSIS User Manual but couldn't find an answer. But I have to warn you, I'm not a software developer, I only have a bit experience with C and HTML.

I have a little problem with the directory of my installation. I read out a path and would like to add a sting to the installation path.

When I try it with Installdirregkey, I can't use variables and therefore I'm not able to add anything to the install path.

If I use ReadRegStr, I can add it to the variable $0, but I cant get the content of it outside the function:

code:
Function .onInit

ReadRegStr $0 HKLM "Software\Microsoft\Microsoft Games\Flight Simulator\9.0\" "EXE Path"

FunctionEnd

code:
InstallDir $0

I get a blank destination back, and not the Path I would like to have. If I put in a messagebox in the function, it works fine.

I'm pretty sure it's a silly question, but actually I'm really blocked.


Kind regards

Marc Laederach

[Mr Inches]

You should use variables to preserve values between functions and sections.

For what you are trying to do, you can use a user defined one or the built-in INSTDIR variable.

For example:

code:


Function .onInit

    ReadRegStr $INSTDIR HKLM "Software\Microsoft\Microsoft Games\Flight Simulator\9.0\" "EXE Path"

FunctionEnd



; INSTDIR should still contain the value set in .onInit unless the user changed in a directory page.

Section Main

    DetailPrint "$INSTDIR"

SectionEnd

OR

code:


Var MyInstallDir



Function .onInit

   ReadRegStr $MyInstallDir HKLM "Software\Microsoft\Microsoft Games\Flight Simulator\9.0\" "EXE Path"

FunctionEnd



Section Main

    InstallDir $MyInstallDir

    DetailPrint "$INSTDIR"

SectionEnd

Duncan

[MarcL]

Hi Duncan

Thank you very much for your help, you could solve one of my problems! I forgot to write the string I want to add to the path I read out from the registry: The path should be "$INSTDIR\Addon Scenery\FreeZ", so I should get $INSTDIR from the registry and add "\Addon Scenery\FreeZ" to it, but it doesn't work. Perhaps it has to do something with the order?


Kind regards

Marc Laederach

[Red Wine]

code:
Function .onInit

ReadRegStr $0 HKLM "Software\Microsoft\Microsoft Games\Flight Simulator\9.0\" "EXE Path"

StrCpy $INSTDIR "$0\Addon Scenery\FreeZ"

FunctionEnd

[MarcL]

Thanks, works pretty good!!


Kind regards

Marc Laederach