define "InstallDir" in a function

I need to set "InstallDir" in a function. but it wont let me do that is there a way i could use a var and then change that in the function ?

Thanks, Tom.

The variable it uses is $INSTDIR, and you can modify $INSTDIR in function or section.

k, how can i define it different in 3 functions ?

It's a variable, so you can change it like any other variable. StrCpy, ReadRegStr, ReadINIStr, ...

Section MainFiles

StrCpy $INSTDIR "$PROGRAMFILES\Foo\Bar"

SetOutPath "$INSTDIR"
...

SectionEnd

Thanks. I knew i be able to change the variable. i just don;t know the commands :S what language is it in ?

Errr... You're writing an installer in NSIS, and you're asking what language it is? It's NSIS script, duh.

Please read the documentation for information on what commands exist and what they do: