This trick is known as "STEGANOGRAPHY" .
Let's see how this trick works.
- First of all write your message on notepad and save it on desktop.
- Then copy a picture and save it on desktop.
- Now open command prompt from your start menu.
Run the following command:
- 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"
- this picture contains your message and you can see your message by opening this picture with notepad.
Thank you.