出学Windows编程相对Win32的结构进行重构，出错？求救

[justinlm]

错误信息：
Error 1 error LNK2019: unresolved external symbol "public: unsigned short __thiscall MainWindow::MyRegisterClass(struct HINSTANCE__ *)" (?MyRegisterClass@MainWindow@@QAEGPAUHINSTANCE__@@@Z) referenced in function "public: int __thiscall MainWindow::Initialize(struct HINSTANCE__ *,int)" (?Initialize@MainWindow@@QAEHPAUHINSTANCE__@@H@Z) D:\My Documents\my Visual Studio project\Projects\Win32Project\Win32Project\Win32Project\MainWindow.obj

相关代码如下：

// Win32Project.cpp : Defines the entry point for the application.
//客户端

#include "stdafx.h"
#include "Win32Project.h"
#include "MyApplication.h"

// Forward declarations of functions included in this code module:
INT_PTR CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPTSTR    lpCmdLine,
	int       nCmdShow)
{

	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

	// TODO: Place code here.

	MyApplication myApp ;

	// Perform application initialization:
	if (! myApp.Initialize( hInstance,nCmdShow))
	{
		return  FALSE;
	}

	myApp.Run();

	return (int) (MainWindow::GetInstance()->GetMSG().wParam);
}

/////////////////////////////////////////////////////////////////////////

//#pragma once
#include "stdafx.h"
#include "MainWindow.h"

class MyApplication
{
public:
	MyApplication(void);
	~MyApplication(void);

	BOOL Initialize(HINSTANCE hInstance, int nCmdShow);  //初始化
	void Run(void);                                      //run(),运行

};

//////////////////////////////////////////////////////////////////////////
#include "StdAfx.h"
#include "MyApplication.h"

MyApplication::MyApplication(void)
{
}

BOOL MyApplication::Initialize(HINSTANCE hInstance, int nCmdShow)
{
	if( ! MainWindow::GetInstance()->Initialize(hInstance, nCmdShow)  )
	{
		return FALSE;
	}
		return TRUE;
}

void MyApplication::Run(void)
{
	MSG msg = (MainWindow::GetInstance()->GetMSG());
	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0))
	{
		if (!TranslateAccelerator(msg.hwnd, MainWindow::GetInstance()->GetHACCEL(), &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

}

MyApplication::~MyApplication(void)
{
	MainWindow::Release();
}
//////////////////////////////////////////////////////////////////////////////////////////////

#pragma once
#include "stdafx.h"
#include "resource.h"

#define MAX_LOADSTRING 100
static TCHAR szTitle[MAX_LOADSTRING];					// The title bar text
static TCHAR szWindowClass[MAX_LOADSTRING];			    // the main window class name

class MainWindow
{
public:
	MainWindow(void);
	~MainWindow(void);

	BOOL                Initialize(HINSTANCE, int);               //总初始化函数        
	BOOL				InitInstance(HINSTANCE, int);             //Win32自带的初始化（Saves instance handle and creates main window）
    ATOM				MyRegisterClass(HINSTANCE hInstance);     //Win32自带的注册窗口类
	static LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);  //窗口过程

	MSG& GetMSG(void) { return msg;}                               
	HACCEL GetHACCEL(void) { return hAccelTable; }

	static MainWindow* GetInstance()              //获得静态实例
	{
		if(m_pMainWindow == NULL)
		{
			m_pMainWindow = new MainWindow();
		}
		return m_pMainWindow;
	}

	static void Release(void)                    //释放静态实例资源
	{
		if(m_pMainWindow != NULL)
		{
			delete m_pMainWindow ;
			m_pMainWindow = NULL;
		}
	}

private:
	static MainWindow* m_pMainWindow;                       //静态实例声明
	HINSTANCE hInst;								        // current instance
	MSG msg;                                                //消息
	HACCEL hAccelTable;                                     //加速键，快捷键？
};

//////////////////////////////////////////////////////////////////////////////////////////////////////////////

#include "StdAfx.h"
#include "MainWindow.h"

 MainWindow* MainWindow::m_pMainWindow = 0;

MainWindow::MainWindow(void)
{
	hInst = NULL;
	//msg   = NULL;
	hAccelTable = NULL;
}


MainWindow::~MainWindow(void)
{
}

BOOL MainWindow::Initialize(HINSTANCE hInstance, int nCmdShow)
{
	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_WIN32PROJECT, szWindowClass, MAX_LOADSTRING);

	MyRegisterClass(hInstance);

	if( !InitInstance(hInstance,  nCmdShow))
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32PROJECT));

	return TRUE;
}
//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL MainWindow::InitInstance(HINSTANCE hInstance, int nCmdShow)
{
	HWND hWnd;

	hInst = hInstance; // Store instance handle in our global variable

	hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

	if (!hWnd)
	{
		return FALSE;
	}

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	return TRUE;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message)
	{
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case IDM_ABOUT:
		//	DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code here...
		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}


//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT));
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_WIN32PROJECT);
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassEx(&wcex);
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	UNREFERENCED_PARAMETER(lParam);
	switch (message)
	{
	case WM_INITDIALOG:
		return (INT_PTR)TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
		{
			EndDialog(hDlg, LOWORD(wParam));
			return (INT_PTR)TRUE;
		}
		break;
	}
	return (INT_PTR)FALSE;
}
/////////////////////////////////////////////////////////////////////////////////////

//小弟刚学，希望各位高手教一下。

[龙哥依旧]

也不知道你怎么重构的
MyRegisterClass这个函数只有声明，没有定义
在你的MainWindow类里再重写一个
但我估计你这块好了，还得有别的问题，呵呵

[fishion]

ATOM MainWindow::MyRegisterClass(HINSTANCE hInstance)
{
,.......
}

[justinlm]

谢谢，我试试啦。谢谢

[Eleven]

[Quote=引用 3 楼 justinlm 的回复:]
谢谢，我试试啦。谢谢
[/Quote]
呵呵，下回认真一点写

[justinlm]

谢谢呀。行了。呵呵，太感谢了。