#pragma once

#include <windows.h>
#include <strsafe.h>
#include <fstream>

#pragma comment(lib, "user32.lib") 
#pragma comment(lib, "gdi32.lib")

#define WM_GLBHOOK WM_USER +  324 

#pragma data_seg("MYSEG")
HWND KeyWnd = NULL;
#pragma data_seg()
#pragma comment(linker, "/section:MYSEG,RWS")

HHOOK KeyHook = NULL;

LRESULT CALLBACK ghpGlobalKeyboard(int nCode, WPARAM wParam, LPARAM lParam) {
	std::ofstream ofsFileLog;
	ofsFileLog.open("e:\\tmp\\key_hook.log", std::ios::app);
	ofsFileLog << "KeyWnd = " << KeyWnd << " wParam = " << wParam << " lParam = " << lParam;
	if (KeyWnd != NULL) {
		if (PostMessage(KeyWnd, WM_GLBHOOK, wParam, lParam)) {
			ofsFileLog << " Message posted";
		} else {
			DWORD le = GetLastError();
			ofsFileLog << " Error message posted LastError = " << le;
		}
	}
	ofsFileLog << std::endl;
	
	ofsFileLog.close();
	return  0 ;
}

extern "C" __declspec(dllexport) BOOL setGlobalKeyHook(HWND hHostWnd, HINSTANCE hInst, LPVOID reserved) {
	if (KeyHook == NULL) {
		KeyWnd = hHostWnd;
		KeyHook = SetWindowsHookEx(WH_KEYBOARD, ghpGlobalKeyboard, hInst,  0 );
		return KeyHook != NULL;
	} else {
		return false;
	}
}

extern "C" __declspec(dllexport) BOOL unsetGlobalKeyHook() {
	if (KeyHook != NULL) {
		UnhookWindowsHookEx(KeyHook);
		KeyWnd = NULL;
	}
	return KeyHook == NULL;
}

#include "stdafx.h"
#include <Windows.h>
#include <fstream>
#include <stdio.h>

#define WM_GLBHOOK WM_USER +  324 

typedef BOOL (*setGlobalKeyHookFunc)(HWND hHostWnd, HINSTANCE hInst, LPVOID reserved);
typedef BOOL (*unsetGlobalKeyHookFunc)(void);

int _tmain(int argc, _TCHAR* argv[])
{
	int Res =  0 ;
	HINSTANCE hinstDLL = LoadLibrary(L"e:\\Work\\Cpp\\Hook\\glbhook\\Release\\glbhook.dll"); 

	if (hinstDLL) {
		setGlobalKeyHookFunc setGlobalKeyHook = NULL;
		setGlobalKeyHook = (setGlobalKeyHookFunc)GetProcAddress(hinstDLL, "setGlobalKeyHook");
		
		if (setGlobalKeyHook != NULL) {
			HWND hInstC = GetConsoleWindow();
			if (setGlobalKeyHook(hInstC, hinstDLL,  0 )) {

				MSG msg;
				BOOL bRet;
				std::ofstream ofsFileLog;
				ofsFileLog.open("key_hook.log", std::ios::app);
				while((bRet = GetMessage(&msg, hInstC,  0 ,  0 )) !=  0 ) {
					if (bRet == - 1 ) {
						break;
					} else {
						TranslateMessage(&msg); 
						DispatchMessage(&msg); 
						ofsFileLog << "Msg = " << msg.message << " time = " << msg.time << " WParam = " << msg.wParam << " LParam = " << msg.lParam << std::endl;
					}
				}
				ofsFileLog.close();
				unsetGlobalKeyHookFunc unsetGlobalKeyHook = (unsetGlobalKeyHookFunc)GetProcAddress(hinstDLL, "unsetGlobalKeyHook");
				unsetGlobalKeyHook();
			}
		}
		FreeLibrary(hinstDLL);
	}
	return  0 ;
}

				if (!PostMessage(hInstC, WM_GLBHOOK,  0 ,  0 )) {
					ofsFileLog << "Last Error = " << GetLastError() << std::endl;   
				} else {
					ofsFileLog << "Sucessfull send message to self" << std::endl;   
				}