How to set currency code (f.e. for Euro money)

Simply add

 'currency_code' => 'EUR',

to the params list in $vars array.

For a complete currency code list go to: https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=devel... and check "currency codes" link.

Hope this helps.

Gianfranco.