How to trigger Finder's Move File Dialog programmatically?

I'm working on a small Cocoa utility that lets the user drag files onto its window and then moves those to a different folder.

Instead of moving the dragged file myself (via [[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceMoveOperation...]), I would like to trigger Finder's "Move File Dialog". This will give the user visual feedback (progress ba开发者_如何学编程r) and take care of error handling (e.g. file at target exists).

I've thought about using an Apple Script, but maybe there's an easier way to bring up that dialog?

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Maybe you should check the NSFileManager. http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSFileManager_Class/Reference/Reference.html