change a keystroke passing a hook(c/c++)

Question

hello!

is it possible to edit a keystroke using a winapi keyboard hook? well, not neccesary a keyboard hook but something like it..

i wanna do something like this:

user presses key 'A'

my function adds 1 to the virtual keycode (just an example)

the 'A' becomes an 'B'

and the 'B' is sent to the destination application

thanks!

Answer 1

First, you need a Keyboardhook. You install a filter and the filter function receives the virtual-key code and the state of the keyboard at the time of the keyboard hook. Then you can change the virtual-key code.

Additional Links:

http://msdn.microsoft.com/en-us/library/ms644990(VS.85).aspx

http://msdn.microsoft.com/en-us/library/ms644984(VS.85).aspx

Answer 2

I think you can do it by eating up the keystroke entered by user by applying keyboard hook. and generating key_event of the character you want.

Answer 3

See tool AutoHotkey, with source code available.