display("abcdefghijklmnopqrstuvwxyz (string)", 4, 5, 0);
display( "display - field length: 5", 6, 10+5+7, 0);
// field length (last parameter): 5, row: 7
display("abcdefghijklmnopqrstuvwxyz", 7, 5, 5);
display( "display - field length: 15", 8, 15+7, 0);
// field length: 15, row: 9
display("abcdefghijklmnopqrstuvwxyz", 9, 5, 15);
display( "display - field length: 26", 10, 15+7, 0);
// field length: 0, row: 11
display("abcdefghijklmnopqrstuvwxyz", 11, 5, 26);
// row: 13, column: 5
display( "edit - field length: 7; move the arrow keys; press END, HOME... ", 13, 5, 0);
// field length (4th parameter): 5, row: 16, column: 5
key = edit(str, 16, 5, 7, 80, &insert, &offset, &index);