The expand utility (EXPAND.EXE) restores compressed files to their original size. Expand determines the compression type used and automatically decompresses it. You can also use the VerInstallFile function to expand MS_ZIP files.
To use expand, use the following syntax:
EXPAND [[options]] source destination
[[options]]
If the source parameter contains wildcards and the destination parameter does not specify a directory, the file must be renamed using the /r option.
If the destination parameter does not contain a filename, the filename specified in the source option will be used when the file is copied to the location specified by the destination parameter.