If you would like to have a document based application attempt to open any file thrown at it, do the following.
Add a document type in the properties tab of the target info for the document based application and do the following:
Name the type “AnyType” *Enter “” for Extensions (minus quotes) Enter “***’” for “OS Types” (minus quotes) *Enter the document class name that will attempt to open the file (e.g. MyDocument)
Now all you have to do is override initWithContentsOfFile:ofType: and drop any file on the dock to test it out!!
note: initWithContentsOfFile:ofType: can pass a directory, so don’t expect AppKit to do anything for you when you allow all file types