
Read the full article at:
http://www.ntwind.com/tutorials/code-signing-from-explorer-context-menu.html


hstart /NOCONSOLE /WAIT /MSG="Successfully signed and timestamped!" 
       /ERRMSG="An error occurred while signing (signtool.exe)." 
       /TITLE="Digital Signature" ""C:\WSDK\Bin\signtool.exe" sign /a /t 
       http://timestamp.comodoca.com/authenticode "Sample.exe""
