I think the keys you need for the ',' and '.' will be COMMA and STOP.
Here is the full list:
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12
ESC, TILDE, MINUS, EQUALS, BACKSPACE, TAB...