Posted: Sun Mar 16, 2003 9:51 pm
Restored from previous forum. Originally posted by tinman.
Ignore this, I think I figured out what it was (the shift keycode distinguishes between the normal keys and the keypad versions). But you might find my ramblings useful in case you come up against it.
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Is there any particular reason that when using Inkey() and pressing an arrow key you get the following:
Chr(224)+Chr(x) ; where x is the keycode
Chr(255)+Chr(42) ; This is the code for the left shift key?
Now I know about the extended characters using 2 keys and so on. But why the double character when pressing the cursor keys? And why is the second one the same as the left shift? And does ASCII code 224 represent something mystical?
Update: The Insert, Home, Page Up, Delete, End and Page down keys also have this behaviour. However, with numlock turned off the keypad versions of those keys do not have the double keycode. So I'm guessing thats it.
I've tried various searches on the net but haven't come up with anything.
This is the code I'm using:
Thanks for your input.
--
I used to be a nihilist but I don't believe in that any more.
(Win98first ed. + all updates, PB3.51, Ed3.53)
Ignore this, I think I figured out what it was (the shift keycode distinguishes between the normal keys and the keypad versions). But you might find my ramblings useful in case you come up against it.
----------
Is there any particular reason that when using Inkey() and pressing an arrow key you get the following:
Chr(224)+Chr(x) ; where x is the keycode
Chr(255)+Chr(42) ; This is the code for the left shift key?
Now I know about the extended characters using 2 keys and so on. But why the double character when pressing the cursor keys? And why is the second one the same as the left shift? And does ASCII code 224 represent something mystical?
Update: The Insert, Home, Page Up, Delete, End and Page down keys also have this behaviour. However, with numlock turned off the keypad versions of those keys do not have the double keycode. So I'm guessing thats it.
I've tried various searches on the net but haven't come up with anything.
This is the code I'm using:
Code: Select all
If OpenConsole()
PrintN("Press Escape to exit")
Repeat
key_pressed$ = Inkey()
If key_pressed$""
; Show the key if it has a printable ASCII code
If Asc(key_pressed$)>=32 And Asc(key_pressed$)<128
PrintN("You pressed: "+Left(key_pressed$, 1))
PrintN("It has a raw code of: "+Str(PeekB(@key_pressed$+1) & $FF))
Else
; Either a non-printable ASCII code or an extended character
PrintN("The key you pressed has raw values of: "+Str(PeekB(@key_pressed$) & $FF)+" and "+Str(PeekB(@key_pressed$+1) & $FF))
EndIf
EndIf
; Wait until escape is pressed
Until Left(key_pressed$, 1) = Chr(27)
CloseConsole()
EndIf
End
--
I used to be a nihilist but I don't believe in that any more.
(Win98first ed. + all updates, PB3.51, Ed3.53)