The following is the code in the DLL, to block the key message, but written in their exe injection after a successful cannot realize the hooks, the last parameter in the SetWindowsHookEx to 0 to become global hooks also not line, and not injection, let messagebox pops up in a DLL can be, but can't, why want to ask next, should be the problem of principle
LRESULT a CALLBACK KeyBordProc (int nCode, WPARAM WPARAM, LPARAM LPARAM)
{
return 1;
}
BOOL APIENTRY DllMain (HMODULE HMODULE,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
The switch (ul_reason_for_call)
{
Case DLL_PROCESS_ATTACH:
{
SetWindowsHookEx (WH_KEYBOARD, KeyBordProc hModule, GetCurrentProcessId ());
}
return TRUE;
}
CodePudding user response:
SetWindowsHookEx last parameter should be a Thread Id, check the SetWindowsHookEx and the return value of the confirmation link is successful, and then again in KeyBordProc next breakpoint debugging and see if I can break down
CodePudding user response:
Saw the return value is the setwindowsHook returns null, but do not know why,,, someone else is also wrote the forehead I cannot here how the hooks
CodePudding user response:
reference 1st floor CharlesSimonyi response: SetWindowsHookEx last parameter should be a Thread Id, check the SetWindowsHookEx and the return value of the confirmation link is successful, and then again in KeyBordProc next breakpoint debugged and see if I can break down saw the return value is the setwindowsHook returns null, but do not know why,,, someone else is also wrote the forehead I cannot here how the hooks CodePudding user response:
reference 1st floor CharlesSimonyi response: SetWindowsHookEx last parameter should be a Thread Id, check the SetWindowsHookEx and the return value of the confirmation link is successful, and then again in KeyBordProc next breakpoint debugged and see if I can break down I put the SetWindowsHookEx last parameter to 0, namely global hooks the return value is not empty, but there is no hook effect, typing no shielding,,, CodePudding user response:
GetLastError what return error CodePudding user response:
There may be such as anti-virus software/firewall to stop CodePudding user response:
reference 5 floor zgl7903 reply: GetLastError what return error error is 87, check up should be a parameter has a problem, you can see what problem? I think is so write ah, is in the DLL call hook will be a problem? CodePudding user response:
GetCurrentProcessId () or is the process ID, the last parameter requirements of the SetWindowsHookEx is thread ID, so the parameter error, CodePudding user response:
refer to the eighth floor CharlesSimonyi response: GetCurrentProcessId () or is the process ID, the last parameter requirements of the SetWindowsHookEx is thread ID, so the parameter error, about global hooks I want to ask, when I last parameter is set to 0, the function returns a null value, show a success, but not my keyboardProc execution, really think impassability,,, could you tell me what do you think? CodePudding user response:
In the http://www.codeproject.com search "hook" CodePudding user response:
references to the tenth floor zhao4zhong1 response: at http://www.codeproject.com search "hook" miss zhao, see you a lot of posts are back this way, I really appreciate it, I want to say to you: last year I bought a backpack CodePudding user response:
11 references yikuaiqiaokeli response: Quote: reference to the tenth floor zhao4zhong1 response: miss zhao, you saw the post is back this way, I really appreciate it, I want to say to you: last year I bought a backpack CodePudding user response:
I am currently also encountered this problem has been solved now CodePudding user response:
Use GetWindowThreadProcessId tied the last argument CodePudding user response:
If the third parameter is the current thread hook to NULL CodePudding user response:
Reference WinAPIOverride source code related fragments, 