WH_Keyboard

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Yehia A.Salam - 05 Oct 2007 23:05 GMT

Hello,

Why does the WH_Keyboard hook intercept all keys as capital letters? for
example when I type "a" I get a 65 keycode (Virtual Key Code for A) in the
wParam of the filter function though I should have got 97 (Virtual Key Code
for a)

Thanks
Yehia A.Salam

Reply to this Message

Mattias Sjögren - 06 Oct 2007 09:36 GMT

>Why does the WH_Keyboard hook intercept all keys as capital letters? for
>example when I type "a" I get a 65 keycode (Virtual Key Code for A) in the
>wParam of the filter function though I should have got 97 (Virtual Key Code
>for a)

Virtual key codes represent keys, not letters. There is only one code
(65, 0x41) representing pressing the A key on the keyboard, whether it
will turn into a capital letter or not. The code 97 (0x61) is
VK_NUMPAD1, it has nothing to do with the A key. I think you're
confusing virtual key codes with ASCII character codes.

To differentiate between small and capital letters you'll have to
check the state of the Shift and Caps Lock keys, or listen to WM_CHAR
messages instead of keyboard messages.

Mattias

Signature

Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

Reply to this Message

Rate this thread:

WH_Keyboard

Free Magazines