Windows Explorer renames files when copying and an existing file is found

Question

Windows Explorer renames files when copying and an existing file is found - do we have access to that facility from Delphi code?

It would be fairly straight forward to write the code to rename the destination filename when using TFile.Copy() , but it would be better to use the existing code if available.

Answer 1

IFileOperation is the API to the shell's file copy functionality. Use it to replicate the shell's behaviour. In your case you will need to use SetOperationFlags to specify the FOF_RENAMEONCOLLISION flag:

Give the item being operated on a new name in a move, copy, or rename operation if an item with the target name already exists.