// MyHookDll.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include <afxdllx.h>
#include "MyHookDll.h"

// 定義共享數據
#pragma data_seg("My_Mouse_Shared")
	HWND		g_hPrevTarWnd = NULL;	// 上次鼠標所指的窗口句柄  
	HWND		g_hDisplayWnd = NULL;	// 顯示目標窗口標題編輯框的句柄 
	HHOOK		g_hHook=NULL;			// 安裝的鼠標鉤子句柄 
	HINSTANCE	g_hInstance=NULL;		// DLL實例句柄 
	//LPMOUSEHOOKSTRUCT pMouseHook;
#pragma data_seg()

// 通過程序指定鏈接選項,真正使得數據能夠共享
#pragma comment(linker, "/SECTION:My_Mouse_Shared,RWS")



#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


static AFX_EXTENSION_MODULE MyHookDllDLL = { NULL, NULL };

extern "C" int APIENTRY
DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	// Remove this if you use lpReserved
	UNREFERENCED_PARAMETER(lpReserved);

	if (dwReason == DLL_PROCESS_ATTACH)
	{
		TRACE0("MYHOOKDLL.DLL Initializing!\n");
		
		// Extension DLL one-time initialization
		if (!AfxInitExtensionModule(MyHookDllDLL, hInstance))
			return 0;

		// Insert this DLL into the resource chain
		// NOTE: If this Extension DLL is being implicitly linked to by
		//  an MFC Regular DLL (such as an ActiveX Control)
		//  instead of an MFC application, then you will want to
		//  remove this line from DllMain and put it in a separate
		//  function exported from this Extension DLL.  The Regular DLL
		//  that uses this Extension DLL should then explicitly call that
		//  function to initialize this Extension DLL.  Otherwise,
		//  the CDynLinkLibrary object will not be attached to the
		//  Regular DLL's resource chain, and serious problems will
		//  result.

		new CDynLinkLibrary(MyHookDllDLL);
		g_hInstance=hInstance;	//插入保存DLL實例句柄 
		//g_hInstance=AfxGetInstanceHandle();	//插入保存DLL實例句柄 
	}
	else if (dwReason == DLL_PROCESS_DETACH)
	{
		TRACE0("MYHOOKDLL.DLL Terminating!\n");
		// Terminate the library before destructors are called
		AfxTermExtensionModule(MyHookDllDLL);
	}
	return 1;   // ok
}

CMyHookDll::CMyHookDll()
{
}

CMyHookDll::~CMyHookDll()
{
	UnInstallHook();
}

BOOL CMyHookDll::InstallHook(HWND hWnd)
{
	BOOL bResult=FALSE; 
	g_hHook=SetWindowsHookEx(WH_MOUSE, MouseProc, g_hInstance, NULL); 
	if(g_hHook!=NULL)
	{
		bResult=TRUE;
	}
	g_hDisplayWnd = hWnd;		//設置顯示目標窗口標題編輯框的句柄 
	return bResult; 
}

BOOL CMyHookDll::UnInstallHook()
{
	BOOL bResult=FALSE; 
	if(g_hHook) 
	{ 
		bResult= UnhookWindowsHookEx(g_hHook); 
		if(bResult) 
		{ 
			g_hPrevTarWnd=NULL; 
			g_hDisplayWnd=NULL;	//清變量 
			g_hHook=NULL; 
		} 
	} 
	return bResult; 
}

LRESULT WINAPI MouseProc(int nCode,WPARAM wparam,LPARAM lparam) 
{ 
	LPMOUSEHOOKSTRUCT pMouseHook=(MOUSEHOOKSTRUCT FAR *)lparam;
	//pMouseHook=(MOUSEHOOKSTRUCT FAR *)lparam;
	if (nCode>=0 && WM_RBUTTONDOWN == wparam) 
	{ 
		HWND hTargetWnd=pMouseHook->hwnd;		//取目標窗口句柄 
		HWND ParentWnd=hTargetWnd; 
		while (ParentWnd !=NULL) 
		{ 
			hTargetWnd=ParentWnd; 
			ParentWnd=GetParent(hTargetWnd); //取應用程序主窗口句柄 
		} 
		if(hTargetWnd!=g_hPrevTarWnd) //(wparam == WM_LBUTTONDOWN)//
		{ 
			
			char szCaption[100]; 
			GetWindowText(hTargetWnd,szCaption,100); //取目標窗口標題 
			if(IsWindow(g_hDisplayWnd)) 
			{
				SendMessage(g_hDisplayWnd,WM_SETTEXT,0,(LPARAM)(LPCTSTR)szCaption); 
			}
			g_hPrevTarWnd=hTargetWnd;	 //保存目標窗口 

		} 
	} 
	//if(nCode >= 0 && wparam==WM_LBUTTONDOWN)
	//	AfxMessageBox("haha");

	return CallNextHookEx(g_hHook,nCode,wparam,lparam); //繼續傳遞消息 
}