The syntax for DUMPBIN is:
Specify one or more binary files, along with any options required to control the information. DUMPBIN displays the information to standard output. You can either redirect it to a file or use the /OUT option to specify a filename for the output.
When you run DUMPBIN on a file without specifying an option, DUMPBIN displays the /SUMMARY output.
When you type the command DUMPBIN without any other command-line input, DUMPBIN displays a usage statement that summarizes its options.