The application form is the same as the Schengen visa application form.
Which documents should I submit with an airport transit visa application
Please contact the:
Botschaft der Republik Österreich
Radnicka cesta 80/IX
HR-10000 Zagreb / Kroatien
E-Mail: agram-ob@bmeia.gv.at
Internet: www.aussenministerium.at/zagreb
Telefon:+385 (1) 48 81 050
Fax: + 385 (1) 48 34 461