The first required parameter, <prompt>, should be a simple descriptive statement about the request, such as, "Save document as?," or "Save test result to:."
The second required parameter is <initial filename>. The first time NewFileName is called this should be empty (ΓÇ£ΓÇ¥) as the user is saving an untitled document. Thereafter, it should contain the name of the document as previously given by the user.