Help System (web edition)

'on key' statement makes possible to branch in a sucro according to
the key pressed by the user as shown in this example:

 11 *Continue (Y/N) ?
 12 - on key
 13 -    key N: goto End
 14 -    key n: goto End
 15 -    key Y: continue
 16 -    key y: continue
 17 - wait 300
 18 *{home}{erase}Thus we are continuing...

Here the sucro prompts the user to press one key by displaying
    Continue (Y/N) ?_
If the user presses N or n, the sucro goes to label 'End'. If the
user presses Y or y, the process continues from the first line (18)
without a '-' in the control column.
The 'wait' line (17) indicates the maximum waiting time for the answer.
If any other key is pressed or no answer is given, the first case (N)
is selected.

In the 'on key' statement, also the following special keys may be tested:
ENTER, RIGHT, LEFT, UP, DOWN, HOME, HELP, ESC,
SP, COLON, INSERT, INS_LINE, DELETE, DEL_LINE, ERASE, NEXT, PREV, DISK,
BACKSP, REF, MERGE, COPY, TAB, HELP, SRCH, ACTIV, MOVE, END, WORDS.

Also calling other sucros by 'load <sucro>' is permitted:

 11 *  A=Continuation{R}
 12 *  B=Alternative B{R}
 13 *  C=Alternative C{R}
 14 *Select one of the alternatives A,B,C:
 15 - on key
 16 -    key ENTER: continue
 17 -    key A: continue
 18 -    key B: goto B1
 19 -    key C: load CSUCRO
 20 - wait 300
 21 *{R}{erase}...

   U = More information on user interaction 
   C = Code words and statements in sucros