pad enter
K_KP_EQUALS   =       keypad equals
K_UP                  up arrow
K_DOWN                down arrow
K_RIGHT               right arrow
K_LEFT                left arrow
K_INSERT              insert
K_HOME                home
K_END                 end
K_PAGEUP              page up
K_PAGEDOWN            page down
K_F1                  F1
K_F2                  F2
K_F3                  F3
K_F4                  F4
K_F5                  F5
K_F6                  F6
K_F7                  F7
K_F8            