The library is designed for simple output in text console. Imagine that you want to write to console window at position (10, 10) text "Hello" in a yellow color on a blue background. With CONIO you can do this with the C code:
gotoxy(10, 10);
textcolor(YELLOW);
textbackground(BLUE);
cputs("Hello");
cout << setxy(10, 10) << setclr(YELLOW) << setbk(BLUE) << "Hello";