Space in Registry Key

Hi All,
i'm newer in NSIS and i've to setting/reading Registry_Key that have space in the name, using command like this

InstallDirRegKey HKLM SOFTWARE\Data Store\Defaults "Install_Dir"

or

WriteRegStr HKLM SOFTWARE\Data Store\Defaults "Install_Dir" "$INSTDIR"

What's the way ?

Thanks

Trik

Put quotes around it, like you did with Install_Dir.

Thank Joost for your help.
Now work fine

Renato