help on INI files

hi all,
i am a beginner to NSIS.i have an installOptions file which contains a text field,i want to display the value in that text field from another ini file

for example if my installOptions file is ab.ini now i want to display the value for the text field in (ab.ini) from another file say Config.ini.How to do this .. Help will be appreciated...

thanks in advance.

I don't know, probably something like this:

ReadINIStr $0 "somefile" "Somesection" "somekey"

WriteINIStr "anotherfile" "anothersection" "anotherkey $0