changing the message with hooks

Asked May 02 '14 at 19:46

Active May 02 '14 at 19:46

Viewed 120 times

i want to learn a bit about how to use hooks so im trying to make a program that will change the input of 'A' to 'B', i'm trying to use the WH_KEYBOARD hook and according to msdn: http://msdn.microsoft.com/en-us/library/windows/desktop/ms644984(v=vs.85).aspx the WParam is "The virtual-key code of the key that generated the keystroke message.", so i tried to change it and use callNextHook.

LRESULT CALLBACK KeyboardProc(
  _In_  int code,
  _In_  WPARAM wParam,
  _In_  LPARAM lParam
)
{
if (wParam == 65)
wParam++;

CallNextHookEx(NULL, ncode, wParam, lParam);
}

i have tried to do something like that, and even without the "if" the changing of wParam doesn't affects the result.

what did i do wrong here? how can i make it to work?

thank you

asked May 02 '14 at 19:46

user2205625

Sorry to state the obvious but did you check the return value from `SetWindowsHookEx()` to make sure the hook actually installed properly? – Zebra North May 02 '14 at 20:03
yes i did and its installed properly, i also tried to return 1 to disable all keys and it works too – user2205625 May 02 '14 at 20:04
OK, what is the value of wParam when the hook is entered? – Martin James May 02 '14 at 20:33
the wParam is changing according to what i do but the output still doesnt change. – user2205625 May 03 '14 at 14:57
is there any other way to do it? – user2205625 May 09 '14 at 17:03

changing the message with hooks

0 Answers0