How can I call the exporter from function?

[joakim@verona.se]

I want to call the exporter in a certain way, so I don't have to type
the same options every time.

Basically I want to do first this:
    (re-search-backward "^\\*\\* ")
    (org-mark-subtree)

Then I want to export the marked subtree as odt.

With command keys it becomes something like:
c-c c-e c-s o o

... If I remember correctly. In this case I would rather do

m-x my-own-canned-exporter

I tried following the exporting dispatcher function but got lost in the
wilderness. Does anyone have a suggestion?
-- 
Joakim Verona