read / write ini files

[RubicBG]

Can u build some simple function to read and write ini files:

ini.exists=('Key') -> boolean
ini.get('Key') -> Value
ini.set(('Key','Value')
ini.set(('Key','Value', reload=true) -> ini.set(('Key','Value') & app.reload
ini.delete('Key')
ini.delete('Key','Value', true) -> ini.delete(('Key','Value') & app.reload

I am trying to create menu that change settings in theme.nss, for example:
from theme.name="auto" to theme.name="modern"
from theme.border.size=1 to theme.border.size=15

Right now is possible with power-shell, but it is too messy:

(Get-Content 'theme.nss') | ForEach-Object {
$_ -replace 'theme.name="auto"', 'theme.name="modern"'
} | Set-Content 'theme.nss'