To display Help for an MS-DOS command
Open Command Prompt
At the command prompt, type the name of the command you want help on, followed by /?.
For example, type chdir /? to get Help on the chdir command.
To open command prompt, click Start, point to All Programs, point to Accessories, and then click Command Prompt.
To display Help one screen at a time, type the command followed by | more. For example, type dir /? | more for Help on the dir command.