C:\>reg query /?

REG QUERY KeyName [/v [ValueName] | /ve] [/s]
          [/f Data [/k] [/d] [/c] [/e]] [/t Type] [/z] [/se Separator]
          [/reg:32 | /reg:64]

  KeyName  [\\Machine\]FullKey
           Machine - Name of remote machine, omitting defaults to the
                     current machine. Only HKLM and HKU are available on
                     remote machines
           FullKey - in the form of ROOTKEY\SubKey name
                ROOTKEY - [ HKLM | HKCU | HKCR | HKU | HKCC ]
                SubKey  - The full name of a registry key under the
                          selected ROOTKEY

  /v       Queries for a specific registry key values.
           If omitted, all values for the key are queried.

           Argument to this switch can be optional only when specified
           along with /f switch. This specifies to search in valuenames only.

  /ve      Queries for the default value or empty value name (Default).

  /s       Queries all subkeys and values recursively (like dir /s).

  /se      Specifies the separator (length of 1 character only) in
           data string for REG_MULTI_SZ. Defaults to "\0" as the separator.

  /f       Specifies the data or pattern to search for.
           Use double quotes if a string contains spaces. Default is "*".

  /k       Specifies to search in key names only.

  /d       Specifies the search in data only.

  /c       Specifies that the search is case sensitive.
           The default search is case insensitive.

  /e       Specifies to return only exact matches.
           By default all the matches are returned.

  /t       Specifies registry value data type.
           Valid types are:
             REG_SZ, REG_MULTI_SZ, REG_EXPAND_SZ,
             REG_DWORD, REG_QWORD, REG_BINARY, REG_NONE
           Defaults to all types.

  /z       Verbose: Shows the numeric equivalent for the type of the valuename.

  /reg:32  Specifies the key should be accessed using the 32-bit registry view.

  /reg:64  Specifies the key should be accessed using the 64-bit registry view.

Examples:

  REG QUERY HKLM\Software\Microsoft\ResKit /v Version
    Displays the value of the registry value Version

  REG QUERY \\ABC\HKLM\Software\Microsoft\ResKit\Nt\Setup /s
    Displays all subkeys and values under the registry key Setup
    on remote machine ABC

  REG QUERY HKLM\Software\Microsoft\ResKit\Nt\Setup /se #
    Displays all the subkeys and values with "#" as the seperator
    for all valuenames whose type is REG_MULTI_SZ.

  REG QUERY HKLM /f SYSTEM /t REG_SZ /c /e
    Displays Key, Value and Data with case sensitive and exact
    occurrences of "SYSTEM" under HKLM root for the data type REG_SZ

  REG QUERY HKCU /f 0F /d /t REG_BINARY
    Displays Key, Value and Data for the occurrences of "0F" in data
    under HKCU root for the data type REG_BINARY

  REG QUERY HKLM\SOFTWARE /ve
    Displays Value and Data for the empty value (Default)
    under HKLM\SOFTWARE

C:\>