Import multiple files at once

Is it possible to change the Import dialog to allow multi selection?
I currently am bringing it up via Rhino.RhinoApp.RunScript('_Import', True) but it only allows a single file to be chosen, and not sure about any arguments I could pass in.

Is there a way to see what arguments are available for commands?

You should be able to run the Import command in scripted mode, if you use the ‘-’ (dash) prefix like so:

RunScript('_-Import <arguments here>', true)

Then, you can run this in a loop to import multiple files without user intervention.

Alternatively, you could use the Rhino File-Open dialog from code, set MultiSelect=true and use the files selected to loop the RunScript command.