HOW TO: Use Automatic Completion with a Command Prompt in Windows XP

To Activate Automatic Completion
For example, to change to the Program Files folder, you can type cd \pro control_character. Or, to display the contents of the Myfile.txt file, you can type type myf control_character. If there are multiple folders or files that match the characters you type, typing the control character again displays the next matching instance. When the correct folder or file is displayed, press ENTER to complete the command. If no folder of file matches the characters that you type, you hear a beep. You can activate or deactivate this feature for a computer, for a user, or for only the current command session.
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