use the mouse to select the numbers.
_*_*_*_update history_*_*_*_ 1.0 created the project 1.1 add the 4 key 1.2 add the 5 key 1.3 add the 6 key 1.4 add the 7 key 1.5 add the 8 key 1.6 fixed some minor bugs 1.7 add the 9 key 1.8 add the A (10) key 1.9 add the B (11) key 2.0 converted the key into botons. A and B converted to 10 and 11 2.1 add the 12 button 2.2 fixed all the bugs for the 2.1 version
