This trick is known as "STEGANOGRAPHY" .

Let's see how this trick works.

  1. First of all write your message on notepad and save it on desktop.

    Notepad
  2. Then copy a picture and save it on desktop.

    Secret
  3. Now open command prompt from your start menu.

Run the following command:

Command Prompt

  • cd(space)desktop(enter)
  • copy(space)/b(space)"file name with its extention"(without inverted commas)+"your text file name"(without inverted commas).txt(space)final.jpg
  • now a new picture will be appear on your desktop named "final.jpg"

    Final
  • this picture contains your message and you can see your message by opening this picture with notepad.

Thank you.