Copying and Moving Files

Before a file can be copied, it must be closed or opened only for reading. No thread can have the file opened for writing. To copy an existing file to a new one, use the CopyFile or CopyFileEx function. Applications can specify whether CopyFile and CopyFileEx fail if the destination file already exists.

The CopyFileEx function also allows an application to specify the address of a callback function (see CopyProgressRoutine) that is called each time another portion of the file has been copied. The application can use this information to display am indicator that shows the total number of bytes copied as a percent of the total file size.

A file must also be closed before an application can move it. The MoveFile and MoveFileEx functions copy an existing file to a new location and deletes the original.

The MoveFileEx function also allows an application to specify how to move the file. The function can replace an existing file, move a file across volumes, and delay moving the file until the operating system is restarted.

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