DLL代码:
LRESULT CALLBACK CBTNewProc(int nCode, WPARAM wParam, LPARAM lParam)
{
std::ofstream file;
file.open("E:\\enter.txt", std::ios::out);
file << nCode;
file.close();
return CallNextHookEx(g_hHook, nCode, wParam, lParam);
}
extern "C" __declspec(dllexport) void installHook()
{
if (g_hHook != NULL){
UnhookWindowsHookEx(g_hHook);
g_hHook = NULL;
}
HINSTANCE hInstance = GetModuleHandle(NULL);
g_hHook = SetWindowsHookEx(WH_CBT, CBTNewProc, NULL, GetCurrentThreadId());
if (g_hHook == NULL)
{
MessageBox(NULL, L"fail!", L"caption", MB_OK);
}
else
{
MessageBox(NULL, L"install success!", L"caption", MB_OK);
}
}
我写了另一个程序来加载这个DLL并调用 installHook
. 显示消息框"install success"但从未调用回调函数,在驱动器E下找不到enter.txt .
我正在使用Win7 VS2013 .
1 回答
对于要在其他进程中设置的挂钩,必须将包含钩子proc的DLL的hInstance传递给
SetWindowsHookEx
.您还应该传递零作为线程ID .