get-key-code in key-event%

Gets the virtual key code for the key event. The virtual key code is either a character or a special key symbol, one of the following:

• 'start

• 'cancel

• 'clear

• 'shift

• 'control

• 'menu

• 'pause

• 'capital

• 'prior

• 'next

• 'end

• 'home

• 'left

• 'up

• 'right

• 'down

• 'escape

• 'select

• 'print

• 'execute

• 'snapshot

• 'insert

• 'help

• 'numpad0

• 'numpad1

• 'numpad2

• 'numpad3

• 'numpad4

• 'numpad5

• 'numpad6

• 'numpad7

• 'numpad8

• 'numpad9

• 'numpad-enter

• 'multiply

• 'add

• 'separator

• 'subtract

• 'decimal

• 'divide

• 'f1

• 'f2

• 'f3

• 'f4

• 'f5

• 'f6

• 'f7

• 'f8

• 'f9

• 'f10

• 'f11

• 'f12

• 'f13

• 'f14

• 'f15

• 'f16

• 'f17

• 'f18

• 'f19

• 'f20

• 'f21

• 'f22

• 'f23

• 'f24

• 'numlock

• 'scroll

• 'wheel-up -- mouse wheel up one notch

• 'wheel-down -- mouse wheel down one notch

• 'release -- indicates a key-release event

• 'press -- indicates a key-press event; usually only from get-key-release-code

The special key symbols attempt to capture useful keys that have no standard ASCII representation. A few keys have standard representations that are not obvious:

• #\space -- the space bar

• #\return -- the Enter or Return key (on all platforms), but not necessarily the Enter key near the numpad (which is reported as 'numpad-enter if the platform distinguishes the two Enter keys)

• #\tab -- the tab key

• #\backspace -- the backspace key

• #\rubout -- the delete key

If a suitable special key symbol or ASCII representation is not available, #\nul (the null character) is reported.

Under X, a 'wheel-up or 'wheel-down event may be sent to a window other than the one with the keyboard focus, because X generates wheel events based on the location of the mouse pointer.

• (send a-key-event get-key-code) -> character or symbol