Windows下记事本源码

在Windows下创建一个win32项目，项目名为NoteBook，默认的程序中资源menu中“文件”下没有“保存”和“另存为”，编辑资源，添加这两项，注意这两项的ID，要和WndProc函数中的相应的WM_COMMAND选项值对应，编辑资源后，相应的resource.h文件中的代码会变化。（PS：resource.h文件处于打开的状态下无法修改资源，要把此文件关闭才能编辑资源）

核心代码如下：

#include "stdafx.h"

#include <windows.h>   
#include "NoteBook.h"
#include <windows.h>
#include <Commdlg.h>

static char g_szClassName[] = "记事本";  
static HINSTANCE g_hInst = NULL;  

#define IDC_MAIN_TEXT   1001   

BOOL LoadFile(HWND hEdit, LPSTR pszFileName)  
{  
    HANDLE hFile;  
    BOOL bSuccess = FALSE;  

    hFile = CreateFile(pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL,  
        OPEN_EXISTING, 0, 0);  
    if(hFile != INVALID_HANDLE_VALUE)  
    {  
        DWORD dwFileSize;  
        dwFileSize = GetFileSize(hFile, NULL);  
        if(dwFileSize != 0xFFFFFFFF)  
        {  
            LPSTR pszFileText;  
            pszFileText = (LPSTR)GlobalAlloc(GPTR, dwFileSize + 1);  
            if(pszFileText != NULL)  
            {  
                DWORD dwRead;  
                if(ReadFile(hFile, pszFileText, dwFileSize, &dwRead, NULL))  
                {  
                    pszFileText[dwFileSize] = 0;   
                    if(SetWindowText(hEdit, pszFileText))  
                        bSuccess = TRUE;   
                }  
                GlobalFree(pszFileText);  
            }  
        }  
        CloseHandle(hFile);  
    }  
    return bSuccess;  
}  

BOOL SaveFile(HWND hEdit, LPSTR pszFileName)  
{  
    HANDLE hFile;  
    BOOL bSuccess = FALSE;  

    hFile = CreateFile(pszFileName, GENERIC_WRITE, 0, 0,  
        CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);  
    if(hFile != INVALID_HANDLE_VALUE)  
    {  
        DWORD dwTextLength;  
        dwTextLength = GetWindowTextLength(hEdit);  
        if(dwTextLength > 0)  
        {  
            LPSTR pszText;  
            pszText = (LPSTR)GlobalAlloc(GPTR, dwTextLength + 1);  
            if(pszText != NULL)  
            {  
                if(GetWindowText(hEdit, pszText, dwTextLength + 1))  
                {  
                    DWORD dwWritten;  
                    if(WriteFile(hFile, pszText, dwTextLength, &dwWritten, NULL))  
                        bSuccess = TRUE;  
                }  
                GlobalFree(pszText);  
            }  
        }  
        CloseHandle(hFile);  
    }  
    return bSuccess;  
}  

BOOL DoFileOpenSave(HWND hwnd, BOOL bSave)  
{  
    OPENFILENAME ofn;  
    char szFileName[MAX_PATH];  

    ZeroMemory(&ofn, sizeof(ofn));  
    szFileName[0] = 0;  

    ofn.lStructSize = sizeof(ofn);  
    ofn.hwndOwner = hwnd;  
    ofn.lpstrFilter = "文本文件 (*.txt)\0*.txt\0所有文件 (*.*)\0*.*\0\0";  
    ofn.lpstrFile = szFileName;  
    ofn.nMaxFile = MAX_PATH;  
    ofn.lpstrDefExt = "txt";  

    if(bSave)  
    {  
        ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY |  
            OFN_OVERWRITEPROMPT;  

        if(GetSaveFileName(&ofn))  
        {  
            if(!SaveFile(GetDlgItem(hwnd, IDC_MAIN_TEXT), szFileName))  
            {  
                MessageBox(hwnd, "保存文件失败", "错误信息",  
                    MB_OK | MB_ICONEXCLAMATION);  
                return FALSE;  
            }  
        }  
    }  
    else  
    {  
        ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;  
        if(GetOpenFileName(&ofn))  
        {  
            if(!LoadFile(GetDlgItem(hwnd, IDC_MAIN_TEXT), szFileName))  
            {  
                MessageBox(hwnd, "打开文件失败", "错误信息",  
                    MB_OK | MB_ICONEXCLAMATION);  
                return FALSE;  
            }  
        }  
    }  
    return TRUE;  
}  

LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)  
{  
    switch(Message)  
    {  
    case WM_CREATE:  
        CreateWindow("EDIT", "",  
            WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL | ES_MULTILINE |  
            ES_WANTRETURN,  
            CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,  
            hwnd, (HMENU)IDC_MAIN_TEXT, g_hInst, NULL);  

        SendDlgItemMessage(hwnd, IDC_MAIN_TEXT, WM_SETFONT,  
            (WPARAM)GetStockObject(DEFAULT_GUI_FONT), MAKELPARAM(TRUE, 0));  
        break;  
    case WM_SIZE:  
        if(wParam != SIZE_MINIMIZED)  
            MoveWindow(GetDlgItem(hwnd, IDC_MAIN_TEXT), 0, 0, LOWORD(lParam),  
            HIWORD(lParam), TRUE);  
        break;  
    case WM_SETFOCUS:  
        SetFocus(GetDlgItem(hwnd, IDC_MAIN_TEXT));  
        break;  
    case WM_COMMAND:  
        switch(LOWORD(wParam))  
        {  
        case ID_FILE_OPEN:  //菜单中的文件打开
            DoFileOpenSave(hwnd, FALSE);  
            break;  
        case ID_FILE_SAVEAS: //菜单中的文件另存为 
            DoFileOpenSave(hwnd, TRUE);  
            break;  
        case IDM_EXIT:  //菜单中的退出
            PostMessage(hwnd, WM_CLOSE, 0, 0);  
            break;  
        case IDM_ABOUT: //菜单中的关于
            MessageBox (NULL, "一个Windows C 记事本程序" , "关于...", 0);  
        }  
        break;  
    case WM_CLOSE:  
        DestroyWindow(hwnd);  
        break;  
    case WM_DESTROY:  
        PostQuitMessage(0);  
        break;  
    default:  
        return DefWindowProc(hwnd, Message, wParam, lParam);  
    }  
    return 0;  
}  


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,  
    LPSTR lpCmdLine, int nCmdShow)  
{  
    WNDCLASSEX WndClass;  
    HWND hwnd;  
    MSG Msg;  

    g_hInst = hInstance;  

    WndClass.cbSize        = sizeof(WNDCLASSEX);  
    WndClass.style         = 0;  
    WndClass.lpfnWndProc   = WndProc;  
    WndClass.cbClsExtra    = 0;  
    WndClass.cbWndExtra    = 0;  
    WndClass.hInstance     = g_hInst;  
    WndClass.hIcon         = LoadIcon(NULL, IDI_APPLICATION);  
    WndClass.hCursor       = LoadCursor(NULL, IDC_ARROW);  
    WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);  
    WndClass.lpszMenuName  = MAKEINTRESOURCE(IDC_NOTEBOOK); //加载菜单资源，菜单资源ID为 IDC_NOTEBOOK 
    WndClass.lpszClassName = g_szClassName;  
    WndClass.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);  

    if(!RegisterClassEx(&WndClass))  
    {  
        MessageBox(0, "注册窗口失败", "错误信息",  
            MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);  
        return 0;  
    }  

    hwnd = CreateWindowEx(  
        WS_EX_CLIENTEDGE,  
        g_szClassName,  
        "记事本程序",  
        WS_OVERLAPPEDWINDOW,  
        CW_USEDEFAULT, CW_USEDEFAULT, 800, 600,  
        NULL, NULL, g_hInst, NULL);  

    if(hwnd == NULL)  
    {  
        MessageBox(0, "创建窗口失败", "错误信息",  
            MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);  
        return 0;  
    }  

    ShowWindow(hwnd, nCmdShow);  
    UpdateWindow(hwnd);  

    while(GetMessage(&Msg, NULL, 0, 0))  
    {  
        TranslateMessage(&Msg);  
        DispatchMessage(&Msg);  
    }  
    return Msg.wParam;  
}  

程序下载地址：http://download.csdn.net/detail/luxiaoxun/4817709