使用DLL的C中的全局键盘钩子不起作用

Question

我试图在C中进行全局键盘挂钩并遇到麻烦。

我的目的是当我键入F2键或Ctrl键时，会打印一些行以检查它是否有效，如果我按下q键，将停止挂钩。

为了测试整个代码，我在某些部分使用了printf。

我不知道如何解决这个问题，但我真的想解决它。

.cpp代码：

#include "stdio.h"
#include "conio.h"
#include "windows.h"

#define DEF_HOOKSTART  "HookStart"
#define DEF_HOOKSTOP  "HookStop"

typedef void(*PFN_HOOKSTART)();
typedef void(*PFN_HOOKSTOP)();

void main() {
    HMODULE hDll = NULL;
    PFN_HOOKSTART HookStart = NULL;
    PFN_HOOKSTOP HookStop = NULL;
    char ch = 0;

    // load Dll
    hDll = LoadLibrary(L"HookTest.dll");
    if (hDll == NULL) {
        printf("load fail \n");
        return;
    }
    else {
        printf("load success \n");
    }

    HookStart = (PFN_HOOKSTART)GetProcAddress(hDll, DEF_HOOKSTART);
    HookStop = (PFN_HOOKSTOP)GetProcAddress(hDll, DEF_HOOKSTOP);

    HookStart();

    printf("press 'q' to quit!\n");

    // if user push 'q' key, HookStop 
    while (1) {
        if (_getch() == 'q') {
            break;
        }
        printf("Test Typing  \n");
    }

    HookStop();

    FreeLibrary(hDll);
}

.dll代码：

#include <stdio.h>
#include <windows.h>

#pragma data_seg(".kbdata")
HINSTANCE g_hInstance = NULL;
HHOOK g_hHook = NULL;
HWND g_hWnd = NULL;
#pragma data_seg()
#pragma comment(linker, "/SECTION:.kbdata,RWS")

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved) {
    switch (dwReason) {
    case DLL_PROCESS_ATTACH:
        g_hInstance = hinstDLL;
        break;

    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}

extern "C" {
    LRESULT __declspec(dllexport) CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {
        printf("Test 1 --- KeyboardProc sucess \n");
        if (nCode >= 0) {
            printf("Test 2 --- \n");
            if (wParam == VK_F2) {
                printf("F2 Key Typed ");
            }
            else if (wParam == VK_CONTROL) {
                printf("Ctrl Key Typed ");
            }
            else {
                printf("Other Key Typed");
            }
        }
        return CallNextHookEx(g_hHook, nCode, wParam, lParam);
    }
}

extern "C" __declspec(dllexport) void HookStart() {

    g_hHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, g_hInstance, 0);
    printf("Test 3 --- HookStart Call \n");
}

extern "C" __declspec(dllexport) void HookStop() {
    printf("Test 4 --- HookStop Call \n");
    if (g_hHook) {
        UnhookWindowsHookEx(g_hHook);
        g_hHook = NULL;
    }
}