Registry key: HKEY_CURRENT_USER\Software\Microsoft\Command Processor
Parameter: DefaultColor
Type: string
Description:
To change color of command prompt set this value to a two-digit hexadecimal number. First digit sets background color and the second sets foreground color. (0 = default).


Registry key: HKEY_CURRENT_USER\software\microsoft\command processor\completion
Parameter: Char
Type: string
Description:
If you set this value to "09", then after any command will be completed automatically. There is an option value "CompletionChar" determines after what key a command will be completed, that is "09" corresponds to the Tab key.