Strings to identify the various keys on the keyboard. 
 -   For alpha keys, the single (uppercase) character value
 is used, such as "Q" 
 -   For Numeric keys, the number is used as in a single character string, like "1" 
 -   Function
 keys are identified as 
"f1" - "f12"  -   Non alpha-numeric character keys (such as the key
 for "[" / "{") are identified by       their unmodified character value (the value obtained by hitting the key without  
 holding shift down), by default - exceptions are listed below. 
 -   Additional key names:
      -
 Space
          - Tab
          - Enter
      - Escape
 
 - Backspace
      - Insert
      - Delete
      -
 Arrow_Up
      - Arrow_Down
      - Arrow_Left
      -
 Arrow_Right
                  - Home
      - End
      -
 Page_Up
          - Page_Down
         - Shift
      -
 Ctrl
      - Alt  
 [Note: Some keys may not be available for capture on every platform]