"New Synthetic" Dialog Box

Hello All,

We created new Custom Importer. When user clicks on our importer from "File->new" menu, he can see PP's "New Synthetic" Dialog box, where he puts settings for new import. In our code we generate new file in imGetPrefs8 as recomended in SDK, but don't know with what size and aspect ration to create new file. I know the setting available in SDKGetInfo8, but how can we access the setting that user chose in "New Synthetic" Dialog Box in imGetPrefs8?

Thank you.