To hide text in notepad
1.Click Start menu button
2.Click All Programs->Accessories->Command Prompt.
3.Type notepad newfile.txt:hidden and press Enter.
4.Here newfile is your file name
5.Click yes .It opens newfile.txt file.
6.Type something and save the file.
7.The file will be automatically saved on your username folder. ie.c:\Documents and Settings\username.
8.Here username is your own username.
9.Close that file and open it again.
10The file won’t show you anything. It should be completely blank
11.To get the written content, open the Command Prompt and type notepad newfile.txt:hidden (same command).