Question : Using 7-zip from command line. Has anybody done it?

I am trying to unzip a file using 7-zip from command line. I tried:
7z e -tzip FileName.zip

from command prompt. I am getting the message:
'7z' is not recognized as an internal or external command, operable program
or batch file.

Any ideas?

Answer : Using 7-zip from command line. Has anybody done it?

You must either switch to the directory in dos mode - C:\Program Files\7-Zip - or wherever you installed it, or just copy the file 7z.exe from above folder to c:\windows\system32\