This function returns the internal code used to represent the given character$ (this will be a value between 0 and 255).
If the supplied parameter is more than one character in length, the code of the first character will be returned. The result 255 represents the ALT key, although this will only be produced with the statement PRINT CODE(INKEY$) if the <ALT> key is being pressed together with a second key, in which case the code of the second key quickly follows. If character$ is a nul string, CODE will return 0.
will print ‘A’.
A short program to reveal the code of the current key being pressed (with special code to trap the instance of the ALT key being pressed):
100 REPeat loop 110 AT 0,0: a$ = INKEY$(#1, -1) 120 IF CODE(a$) = 255 130 PRINT 'ALT+' & CODE(INKEY$) & ' ' 140 ELSE PRINT CODE(a$);' ' 150 END IF 160 END REPeat loop
Try replacing lines 110 to 150 with: 110 AT 0,0: PRINT CODE(INKEY$(-1))
Please refer to the Characters section of the Appendix for a full list of the characters and their internal codes.