Low level Keyboard hook and keyboard synthesizes

Hi gurus,

my problem is related to keyboard event synthesis on an application which uses low level keyboard hooking.

application A uses LL hook to capture the function keys and posts messages to some windows when 'LLKHF_UP' is detected. It works fine when we press the function keys on keyboard.

our application B ( is a kind of remote control app ) synthesizes the keyboard events using keybd_event function ( A and B runs in same machine )

It seems that when using keybd_event, the hooked application never gets LLKHF_UP flag, instead it gets 'LLKHF_INJECTED' ( it is logical :) ). but why didn't it get the up event? [ up flag is set on the keybd_event fn ]

I tried it with the windows virtual keyboard, which also displays the same behavior.

Now is there ANY way to simulate the up flag in app A ?
Please put some thoughts
Thanks

is the question vague?

you need to generate the upkey events yourself via the keybd_event call.
if you only generate down keys, you're only going to see injected down keys as well.


See the dwFlags member in keybd_event() (http://msdn.microsoft.com/en-us/library/aa928103.aspx)

Thanks for the reply

The up key event is generated, but is not captured by the hooked app. only down event is captured.