Syntax	Input.KeyDown (var chars : array char of boolean)
Description	The Input.Keydown procedure allows a program to read which keys are currently being pressed. This procedure is different from getch in that it allows a program to detect when a user presses and releases a button. As such, it is not to be used in conjunction with getch. The procedure can be used in games where an action takes place while a key is depressed.
Example	Determine if the T key is pressed. Note that we check for the lower case letter. var chars : array char of boolean Input.KeyDown (chars) if chars ('t') then put "The T key is pressed" end if
Details	The array returned is a list of all the characters. A key is currently pressed if the array element with the corresponding character is true. For example, the a key is pressed is chars ('a') is true. Note that each key is individually represented, so if the user has pressed Shift+a to get a 'A', then Input.KeyDown would register Shift and 'a' as pressed, but not 'A'. A full list of all the possible characters that can be set with Input.KeyDown can be found in the Key Codes appendix.
Details	The array returned is a list of all the characters. A key is currently pressed if the array element with the corresponding character is true. For example, the a key is pressed is chars ('a') is true. Note that each key is individually represented, so if the user has pressed Shift+a to get a 'A', then Input.KeyDown would register Shift and 'a' as pressed, but not 'A'.
Details	The number of keys that can be pressed simultaneously is hardware dependent. Most keyboards can detect a minimum of two keys + Shift + Control + Alt. This means that if you are designing a two player game to be played at a single keyboard and you wish to make certain that players cannot “hog the keyboard” by holding down keys, you should not use more than 6 different keys and three of them should be the Shift, Control and Alt keys.
Example	The program reads the keyboard and displays a message while the arrow keys are pressed. It can detect up to all four arrow keys pressed at once. var chars : array char of boolean loop Input.KeyDown (chars) locate (1, 1) if chars (KEY_UP_ARROW) then put "Up Arrow Pressed " .. else put " " .. end if if chars (KEY_RIGHT_ARROW) then put "Right Arrow Pressed " .. else put " " .. end if if chars (KEY_LEFT_ARROW) then put "Left Arrow Pressed " .. else put " " .. end if if chars (KEY_DOWN_ARROW) then put "Down Arrow Pressed " .. else put " " .. end if end loop
Execute
Example	Another example is available that checks for all possible keys.
Status	Exported qualified. This means that you can only call the function by calling Input.KeyDown, not by calling KeyDown.