To read from a text file in C, you will need to open a file stream using the fopen () function. Once a file stream has been opened, you can then read the file line by line using the fgets () function.

Win32 Disk Imager is a free tool for Windows to write an IMG file to removable device and backup your removable device to a raw image file.

You can write an Invisible Secret Text Message in an Image File, by following this trick laid down in this post. All you need is the Notepad!