I am trying to limit the number of characters are in a section before the user cannot type anymore.

Any help would be great! here is what I have in that section already:

 if (textBoxFocus == 0)title += key;              //if the 'title' box is selected, let the user write in it.
        if (textBoxFocus == 1)description += key;        //if the 'description' box is selected, let the user write in it.

        if ((title.length() % 12) == 0) title+='\n';     //if the letters writen in the'title' section reach over 12, start a new line.
        if ((description.length() % 20) == 0) description+='\n';// if the letters in the 'description' section reach over 20, start a new line.