utiltydll.cpp

来自「此为本书的配套光盘.本书不但由浅入深地讲解了软件保护技术」· C++ 代码 · 共 115 行

// UtiltyDll.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
#include "UtiltyDll.h"

UTILTYDLL_API HWND hDll=0;

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szWindowClass[] = "UtilityDll";								// The title bar text

// Foward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);

BOOL APIENTRY DllMain( HINSTANCE hInstance, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
					 )
{
    switch (ul_reason_for_call)
	{
		case DLL_PROCESS_ATTACH:
		case DLL_THREAD_ATTACH:
			{
				MyRegisterClass(hInstance);
				
				// Perform application initialization:
				if (!InitInstance (hInstance)) 
				{
					return FALSE;
				}
			}
			break;
		case DLL_THREAD_DETACH:
		case DLL_PROCESS_DETACH:
			{
				if( NULL != hDll )
				{
					DestroyWindow(hDll);
					hDll = NULL;
				}
			}
			break;
    }
    return TRUE;
}


ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;
	
	wcex.cbSize = sizeof(WNDCLASSEX); 
	
	wcex.style			= 0;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= 0;
	wcex.hCursor		= 0;
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= "";
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= 0;
	
	return RegisterClassEx(&wcex);
}

BOOL InitInstance(HINSTANCE hInstance)
{
	hInst = hInstance; // Store instance handle in our global variable
	
	hDll = CreateWindow(szWindowClass, "", 0,//WS_OVERLAPPEDWINDOW,
		0, 0, 0, 0, NULL, NULL, hInstance, NULL);
	
	if (!hDll)
	{
		return FALSE;
	}
	
	ShowWindow(hDll, SW_HIDE);
	UpdateWindow(hDll);
	
	return TRUE;
}
//内部功能函数前置声明；
void InternalShowMsgBox(WPARAM wParam, LPARAM);
//窗口过程处理函数，它进行窗口默认处理和功能消息的分发；
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message) 
	{
	case WM_SHOWMSGBOX://识别功能消息，调用内部功能函数
		InternalShowMsgBox(wParam,lParam);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}
//内部功能函数实现
void InternalShowMsgBox(WPARAM wParam, LPARAM /* not use */)
{
	sShowMsgBoxParam * pParam = (sShowMsgBoxParam*)wParam;
	::MessageBox(NULL,pParam->sText,pParam->sTitle,pParam->nStyle);
}