How do I get keyboard scancodes and know it's an extended key?

[onidarbe]

How or with what API can I know which key is an extended key to be able to use keybd_event with the correct dwFlags?

If I only know how to make a listing like JackTripper did on following link, then I would know that every key starting with a scancode of E0 arebe extended keys.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646304.aspx
...
N 31
M 32
< , 33
> . 34
? / 35
R SHIFT 36
L CTRL 1D
L ALT 38
Space Bar 39
R ALT E0 38
R CTRL E0 1D
Insert E0 52
Delete E0 53
L Arrow E0 4B
Home E0 47
End E0 4F
Up Arrow E0 48
Dn Arrow E0 50
Page Up E0 49
...

[Bonnie West]

See the MapVirtualKey function.

Translates (maps) a virtual-key code into a scan code or character value, or translates a scan code into a virtual-key code.

Private Enum MapVKTypeConstants
    MAPVK_VK_TO_VSC = 0
    MAPVK_VSC_TO_VK = 1
    MAPVK_VK_TO_CHAR = 2
    MAPVK_VSC_TO_VK_EX = 3
End Enum
#If False Then
    Dim MAPVK_VK_TO_VSC, MAPVK_VSC_TO_VK, MAPVK_VK_TO_CHAR, MAPVK_VSC_TO_VK_EX
#End If

Private Declare Function MapVirtualKeyW Lib "user32.dll" (ByVal uCode As Long, ByVal uMapType As MapVKTypeConstants) As Long

EDIT

From the WM_KEYDOWN/WM_KEYUP messages:

For enhanced 101- and 102-key keyboards, extended keys are the right ALT and CTRL keys on the main section of the keyboard; the INS, DEL, HOME, END, PAGE UP, PAGE DOWN, and arrow keys in the clusters to the left of the numeric keypad; and the divide (/) and ENTER keys in the numeric keypad. Other keyboards may support the extended-key bit in the lParam parameter.

EDIT 2

Also from the Keystroke Message Flags:

Extended-Key Flag

The extended-key flag indicates whether the keystroke message originated from one of the additional keys on the enhanced keyboard. The extended keys consist of the ALT and CTRL keys on the right-hand side of the keyboard; the INS, DEL, HOME, END, PAGE UP, PAGE DOWN, and arrow keys in the clusters to the left of the numeric keypad; the NUM LOCK key; the BREAK (CTRL+PAUSE) key; the PRINT SCRN key; and the divide (/) and ENTER keys in the numeric keypad. The extended-key flag is set if the key is an extended key.

[onidarbe]

So rather then a api telling if a key is an extended key, I need to make a list of them, because there are always the same no matter what keyboard, right?

[Bonnie West]

Well, checking if a key belongs to the extended key list would seem to be the easiest way. However, MSDN mentions that "Other keyboards may support the extended-key bit in the lParam parameter." so, that method isn't very reliable. I haven't been able to find the proper solution yet, but in the meantime, that method should suffice for most purposes. Sorry!

[onidarbe]

ok, thanks!