#include "stdafx.h"

#define DEF_PROCESS_NAME "notepad.exe"
LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam);


HINSTANCE g_Hinstance = NULL;
HHOOK g_hHook = NULL;
HWND g_hWnd = NULL;

BOOL APIENTRY DllMain( HMODULE hModule,DWORD  ul_reason_for_call,LPVOID lpReserved)
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
		g_Hinstance = hModule;
		MessageBoxA(NULL, "加载成功", "加载成功", MB_OK);
		break;
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}

#ifdef __cplusplus
extern"C" {
#endif
	__declspec(dllexport) void HookStart()
	{
		g_hHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, g_Hinstance, 0);
	}
	__declspec(dllexport) void HookStop()
	{
		if (g_hHook)
		{
			UnhookWindowsHookEx(g_hHook);
			g_hHook = NULL;
		}
	}
#ifdef __cplusplus
}
#endif 

LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)
{
	char szPath[MAX_PATH] = { 0 };
	char *p = NULL;

	if (nCode >= 0)
	{
		if (!(lParam & 0x8000000)) 
		{
			GetModuleFileNameA(NULL, szPath, MAX_PATH);
			
			p = strrchr(szPath, '\\');
		
			if (!_stricmp(p + 1, DEF_PROCESS_NAME))
			{
				return 1;
			}

		}
	}
	return CallNextHookEx(g_hHook, nCode, wParam, lParam);
}