Detecting the Current State of the Shift Keys

This routine enables you to determine which, if any, of the shift keys are currently pressed.

Use the following call to determine which of the shift keys are currently pressed: 

call x"AF" using    adis-function
                    adis-parameter

where adis-function and adis-parameter are defined in the Working-Storage Section of your program as follows: 

 01 adis-function       pic 9(2) comp-x.
 01 adis-parameter      pic 9(4) comp-x.

where:

adis-function
is 46.
adis-parameter
returns which of the shift keys are currently pressed. The 16 bits in adis-parameter refer to shift keys as follows, with bit 0 the least significant:
Bit Associated Key
4 - 15 Reserved
3 Alt
2 Ctrl
1 Left-shift
0 Right-shift
Parent topic: Shift Key Handling