程序如下：
// FIleDemo.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include "stdio.h"
#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;                                // current instance
TCHAR szTitle[MAX_LOADSTRING];                                // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];                                // The title bar text

// Foward declarations of functions included in this code module:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK    About(HWND, UINT, WPARAM, LPARAM);
char buf[80]={0};
int count=0;

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
     // TODO: Place code here.
    MSG msg;
    HACCEL hAccelTable;

    // Initialize global strings
    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadString(hInstance, IDC_FILEDEMO, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

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

    hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_FILEDEMO);

    // Main message loop:
    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is 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)WndProc;
    wcex.cbClsExtra        = 0;
    wcex.cbWndExtra        = 0;
    wcex.hInstance        = hInstance;
    wcex.hIcon            = LoadIcon(hInstance, (LPCTSTR)IDI_FILEDEMO);
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground    = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName    = (LPCSTR)IDC_FILEDEMO;
    wcex.lpszClassName    = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

    return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HANDLE, 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 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, unsigned, WORD, LONG)
//
//  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
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;
    TCHAR szHello[MAX_LOADSTRING];
    LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
    static haveCaret=false;
    HANDLE hf;
    DWORD ct;
    char a='A';
    int b=20;
    float c=3.2f;
    char s[50];
    static int l=1;
    switch (message)
    {
        
       case WM_CREATE:
           CreateCaret(hWnd,NULL,2,20);
           SetCaretPos(0,10);
           ShowCaret(hWnd);

       case WM_COMMAND:
              wmId    = LOWORD(wParam);
            wmEvent = HIWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
                case IDM_ABOUT:
                   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
                   break;
                case IDM_SAVE:
               
                    hf=CreateFile("c:\\f1.txt",
                        GENERIC_WRITE,
                        0,//无共享
                        NULL,//缺省安全属性
                        CREATE_ALWAYS,
                        FILE_ATTRIBUTE_NORMAL,
                        (HANDLE)NULL);//无模板
                /*    WriteFile(hf,//句柄
                        "welcome",//数据
                        sizeof("welcome"),//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板*/
                    WriteFile(hf,//句柄
                        &a,//数据
                        sizeof(a),//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板
                    WriteFile(hf,//句柄
                        &b,//数据
                        sizeof(b),//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板
                    WriteFile(hf,//句柄
                        &a,//数据
                        sizeof(a),//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板
                    WriteFile(hf,//句柄
                        &c,//数据
                        sizeof(c),//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板
                    WriteFile(hf,//句柄
                        buf,//数据
                        count,//准备写入字节数
                        &ct,//实际写入字节数
                        NULL);//无模板
                    CloseHandle(hf);            
                    break;

                case IDM_OPEN:
                    hdc=GetDC(hWnd);
                    hf=CreateFile("c:\\f1.txt",
                            GENERIC_READ,
                            0,//无共享
                            NULL,//缺省安全属性
                            OPEN_ALWAYS,
                            FILE_ATTRIBUTE_NORMAL,
                            (HANDLE)NULL);//无模板
                    ReadFile(hf,//句柄
                        &a,//数据
                        sizeof(a),//准备读入字节数
                        &ct,//实际读入字节数
                        NULL);//无模板
                    ReadFile(hf,//句柄
                        &b,//数据
                        sizeof(b),//准备读入字节数
                        &ct,//实际读入字节数
                        NULL);//无模板
                    ReadFile(hf,//句柄
                        &a,//数据
                        sizeof(a),//准备读入字节数
                        &ct,//实际读入字节数
                        NULL);//无模板
                    ReadFile(hf,//句柄
                        &c,//数据
                        sizeof(c),//准备读入字节数
                        &ct,//实际读入字节数
                        NULL);//无模板*/
                    ReadFile(hf,//句柄
                        buf,//数据
                        80,//准备读字节数
                        &ct,//实际读入字节数
                        NULL);//无模板
                    count=ct;
                    sprintf(s,"%c,%d,%f",a,b,c);
                    TextOut(hdc,0,0,s,strlen(s));                  
                    TextOut(hdc,0,20,buf,ct);
                    CloseHandle(hf);   
                    ReleaseDC(hWnd,hdc);            
                    break;
                case IDM_SEARCH:
                    char buf[200],*p;
                    SearchPath("D:\\winrar","Rar","NULL",200,buf,&p);
                    MessageBox(hWnd,buf,"",MB_OK);
                    break;
                case IDM_ENUM:
                    hdc=GetDC(hWnd);
                    WIN32_FIND_DATA finddata;
                    HANDLE hFind;
                    BOOL f;
                    hFind=FindFirstFile("d:\\我的文档\\*.*" ,&finddata);
                    if(hFind!=INVALID_HANDLE_VALUE){
                        f=true;
                        while(f){                           
                         TextOut(hdc,0,20*l++,finddata.cFileName,strlen(finddata.cFileName));
                        f=FindNextFile(hFind,&finddata);
                        }                        
                    }
                    ReleaseDC(hWnd,hdc);
                    break;               
                case IDM_EXIT:
                   DestroyWindow(hWnd);
                   break;
                default:
                   return DefWindowProc(hWnd, message, wParam, lParam);
            }
            break;
        case WM_CHAR:
            SIZE sz;
            hdc=GetDC(hWnd);
            if(count<80){
                buf[count++]=wParam;
                GetTextExtentPoint32(hdc,buf,count,&sz);
                SetCaretPos(0+sz.cx,20);
            }
            TextOut(hdc,0,20,buf,count);
            ReleaseDC(hWnd,hdc);
            break;
        case WM_PAINT:
            hdc = BeginPaint(hWnd, &ps);
            // TODO: Add any drawing code here...
            RECT rt;
            GetClientRect(hWnd, &rt);
            TextOut(hdc,0,20,buf,count);
            EndPaint(hWnd, &ps);
            break;
            
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

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

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