C++ Windows API:WM_COPYDATA无限循环

我有一个学校的项目，我得到了一个错误，我不知道如何修复。 我目前正在使用Visual Studio 2015，并使用控制台应用程序。 我的项目是：我需要制作一个应用程序，其中一个进程向另一个进程发送文本文件的内容，一行接一行。在5到5秒内发送一行。接收者将获得该行35秒，并将其写入一个文件中，然后接收者将向发送者发送一条消息，说明该行已收到。 我曾尝试使用PCOPYDATASTRUCT和WM_COPYDATA创建这个项目，并且我使用fgets和fput从文件中读写。 我的问题是它进入了一个无限循环，在几秒钟内创建了一个1gb的文本文件，并且只复制了第一行。我试着尽我所能解决问题，但什么都没有改变。 希望你能帮助我，谢谢。 以下是发送应用程序：

    #undef UNICODE
#pragma warning(disable:4996)
#include<stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
#include <windows.h>
using namespace std;
#define MAXLEN 100

const int ID_BUTTON = 1;
const int ID_EDIT = 2;
FILE *pFile;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PSTR szCmdLine, int iCmdShow)
{
    static char szAppName[] = "Send";
    HWND        hwnd;
    MSG         msg;
    WNDCLASSEX  wndclass; // obiectul instantiat din structura WNDCLASSEX

    wndclass.cbSize = sizeof(wndclass);//Dimensiunea structurii
    wndclass.style = CS_HREDRAW | CS_VREDRAW; //Stilul ferestrei
    wndclass.lpfnWndProc = WndProc; // Procedura de fereastra care trateaza mesajele
                                    // Doua câmpuri care permit rezervarea de spatiu suplimentar in structura class, respectiv structura window.
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance; //Identificatorul instantei ferestrei
                                    //Stabileste o pictograma pentru toate ferestrele create pe baza clasei window
    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    //Stabileste o pictograma pentru cursor
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    //Specifica culoarea de fundal a ferestrei
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL; // Specifica meniul feresterei
    wndclass.lpszClassName = szAppName; // Specifica numele feresterei
    wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    //Inregistrarea clasei de fereastra
    RegisterClassEx(&wndclass);

    // Crearea ferestrei pe baza clasei de fereastra
    hwnd = CreateWindow(szAppName,         // window class name
        "Aplicatia Send",     // window caption
        WS_OVERLAPPEDWINDOW,     // window style
        100,           // initial x position
        100,           // initial y position
        1200,           // initial x size
        800,           // initial y size
        NULL,                    // parent window handle
        NULL,                    // window menu handle
        hInstance,               // program instance handle
        NULL);                   // creation parameters

    ShowWindow(hwnd, iCmdShow); // afiseaza fereastra pe ecran
                                //transmite catre WndProc un mesaj de tip WM_PAINT, care are ca rezultat
                                //redesenarea ferestrei, adica reactualizarea zonei client a ferestrei
    UpdateWindow(hwnd); // 

                        // preia si distribuie mesaje pana se primeste WM_QUIT
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg); // traduce mesajul
        DispatchMessage(&msg); // transmite mesajul catre procedura de fereastra
    }
    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{

    HDC hdc; //contextul grafic
    PAINTSTRUCT ps; // o variabila la structura de desenare
    RECT rect; //obiect dreptunghi
    TEXTMETRIC tm;
    HWND hwndReceive;
    static int cxChar, cyChar;
    static HWND hEdit, hButtonOk;
    COPYDATASTRUCT cs;
    char mystring[100];
    SYSTEMTIME LocalTime;
    hwndReceive = FindWindow("Recieve", "RecieveMessage");

    switch (iMsg)
    {
    case WM_CREATE: //operatii ce se executa la crearea ferestrei
    {
        pFile = fopen("fis.txt", "r");
        if (pFile == NULL)

        {
            MessageBox(hwnd, "Nu am gasit fisierul sursa!", "Eroare SEND!", MB_OK);
            return 0;
        }

        hdc = GetDC(hwnd);
        SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
        GetTextMetrics(hdc, &tm);
        cxChar = tm.tmAveCharWidth;
        cyChar = tm.tmHeight + tm.tmExternalLeading;
        ReleaseDC(hwnd, hdc);
        hButtonOk = CreateWindow("button", "Trimite date", WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON,
            10 * cxChar, cyChar * 8, 50 * cxChar, 2 * cyChar,
            hwnd, (HMENU)ID_BUTTON, ((LPCREATESTRUCT)lParam)->hInstance, NULL);

        hEdit = CreateWindow("edit", "", WS_CHILD | WS_VISIBLE | ES_READONLY | WS_VSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_LEFT | WS_BORDER,
            40 * cxChar, cyChar * 25, 60 * cxChar, 10 * cyChar,
            hwnd, (HMENU)ID_EDIT, ((LPCREATESTRUCT)lParam)->hInstance, NULL);

    }
    return 0;

    case WM_COMMAND:
    {

        if (LOWORD(wParam) == ID_BUTTON)
        {

            if (hwndReceive != NULL)
            {

                GetLocalTime(&LocalTime);
                printf("Timpul sistem este: %02d:%02d:%02d\n", LocalTime.wHour, LocalTime.wMinute, LocalTime.wSecond);

                int TimpPornire = LocalTime.wHour * 3600 + LocalTime.wMinute * 60 + LocalTime.wSecond;

                GetLocalTime(&LocalTime);
                while ((fgets(mystring, 100, pFile) != NULL))
                {

                    cs.cbData = strlen(mystring);
                    cs.lpData = mystring;
                    SendMessage(hwndReceive, WM_COPYDATA, (WPARAM)hwnd, (LPARAM)&cs);
                    SetDlgItemText(hwnd, ID_EDIT, "Se trimit datele...");
                    Sleep(5000);
                    GetLocalTime(&LocalTime);
                    int TimpCurent = LocalTime.wHour * 3600 + LocalTime.wMinute * 60 + LocalTime.wSecond;
                    if (TimpCurent - TimpPornire >= 35)
                    {
                        SetDlgItemText(hwnd, ID_EDIT, "Au trecut 35 de secunde!");
                        break;
                    }

                }

                fclose(pFile);
                CloseHandle(hwnd);

            }

            else

            {
                MessageBox(hwnd, "Nu am gasit procesul fiu(Recieve)!", "Eroare SEND!", MB_OK);
                return 0;
            }


        }

    }
        return 0;



    case WM_DESTROY://operatii ce se executa la distrugerea ferestrei
        PostQuitMessage(0); // insereaza un mesaj de incheiere in coada de mesaje
        return 0;
    }
    // Alte mesaje sunt trimise catre functia implicita de tratare
    return DefWindowProc(hwnd, iMsg, wParam, lParam);
    }

#未定义UNICODE
#杂注警告（禁用：4996）
#包括
#包括
#包括
#包括
#包括
使用名称空间std；
#定义MAXLEN 100
const int ID_按钮=1；
const int ID_EDIT=2；
文件*pFile；
LRESULT回调WndProc（HWND、UINT、WPARAM、LPARAM）；
int WINAPI WinMain（HINSTANCE HINSTANCE、HINSTANCE HPPreInstance、，
PSTR szCmdLine，int iCmdShow）
{
静态字符szAppName[]=“发送”；
HWND-HWND；
味精；
WNDCLASSEX wndclass；//对象实例化din structura WNDCLASSEX
wndclass.cbSize=sizeof（wndclass）；//维度结构
wndclass.style=CS|HREDRAW | CS|u VREDRAW；//Still ferestrei
wndclass.lpfnWndProc=WndProc；//
//Doua c–mpuri护理许可证位于structura类，分别位于structura窗口。
wndclass.cbClsExtra=0；
wndclass.cbWndExtra=0；
wndclass.hInstance=hInstance；//Identificatorul instantei ferestrei
//Stabileste o pictograma pentru toate ferestrele创建pe baza clasei窗口
wndclass.hIcon=LoadIcon（空，IDI_应用程序）；
//稳定的pentru光标象形图
wndclass.hCursor=LoadCursor（空，IDC_箭头）；
//费尔斯特里基金会特别会议室
wndclass.hbrBackground=（HBRUSH）GetStockObject（白色画笔）；
wndclass.lpszMenuName=NULL；//specifia meniul feresterei
wndclass.lpszClassName=szAppName；//Specifica numele feresterei
wndclass.hIconSm=LoadIcon（空，IDI_应用程序）；
//在法国
RegisterClassEx（&wndclass）；
//弗雷斯特雷酒店
hwnd=CreateWindow（szAppName，//窗口类名称
“Aplicia Send”，//窗口标题
WS\u重叠窗口，//窗口样式
100，//初始x位置
100，//初始y位置
1200，//初始x尺寸
800，//初始y尺寸
NULL，//父窗口句柄
NULL，//窗口菜单句柄
hInstance，//程序实例句柄
NULL）；//创建参数
ShowWindow（hwnd，iCmdShow）；//afiseaza fereastra pe ecran
//将油漆、涂料和其他材料输送至现场
//redesenarea ferestrei，adica reactualizarea zonei客户a ferestrei
更新窗口（hwnd）；//
//首先，我要分发一份最重要的工作
while（GetMessage（&msg，NULL，0，0））
{
TranslateMessage（&msg）；//traduce mesajul
DispatchMessage（&msg）；//发送mesajul catre程序
}
返回msg.wParam；
}
LRESULT回调WndProc（HWND HWND、UINT iMsg、WPARAM WPARAM、LPARAM LPARAM）
{
HDC HDC；//上下文图形
PAINTSTRUCT ps；//设计结构的变化
RECT RECT；//对象dreptunghi
textmetricTM；
HWND-hwnreceive；
静态int-cxChar，cyChar；
静态HWND hEdit，hButtonOk；
复制数据结构；
char mystring[100]；
系统时间本地时间；
hwnreceive=FindWindow（“接收”、“接收消息”）；
开关（iMsg）
{
案例WM_CREATE://operatii ce se executa la Creara ferestrei
{
pFile=fopen（“fis.txt”，“r”）；
if（pFile==NULL）
{
消息框（hwnd，“Nu am gasit fisierul sursa！”，“Eroare SEND！”，MB_OK）；
返回0；
}
hdc=GetDC（hwnd）；
选择对象（hdc、GetStockObject（系统固定字体））；
GetTextMetrics（hdc和tm）；
cxChar=tm.tmAveCharWidth；
cyChar=tm.tmHeight+tm.tmexternalreading；
释放DC（hwnd、hdc）；
hButtonOk=CreateWindow（“按钮”、“Trimite日期”、WS|u CHILD | WS|u VISIBLE | BS|u def按钮、，
10*cxChar，cyChar*8，50*cxChar，2*cyChar，
hwnd，（humenu）ID_按钮，（（LPCREATESTRUCT）lpram）->hInstance，NULL）；
hEdit=CreateWindow（“编辑”），WS|u CHILD | WS|u VISIBLE | ES|u READONLY | WS|u VSCROLL | ES|u AUTOVSCROLL | ES|u LEFT | WS|u BORDER，
40*cxChar，cyChar*25，60*cxChar，10*cyChar，
hwnd，（humenu）ID_EDIT，（（LPCREATESTRUCT）lParam）->hInstance，NULL）；
}
返回0；
case WM_命令：
{
如果（LOWORD（wParam）==ID_按钮）
{
如果（hwnreceive！=NULL）
{
GetLocalTime（&LocalTime）；
printf（“Timpul系统este:%02d:%02d:%02d\n”，LocalTime.wHour，LocalTime.wMinute，LocalTime.wssecond）；
int timpbornire=LocalTime.wHour*3600+LocalTime.wMinute*60+LocalTime.wssecond；
GetLocalTime（&LocalTime）；
while（（fgets（mystring，100，pFile）！=NULL））
{
cs.cbData=strlen（mystring）；
cs.lpData=mystring；
发送消息（HwnReceive、WM_COPYDATA、（WPARAM）hwnd、（LPRAM）和cs）；
 #undef UNICODE
#pragma warning(disable:4996)
#include<stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iostream>
#include <windows.h>
using namespace std;
#define MAXLEN 100


LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PSTR szCmdLine, int iCmdShow)
{
    static char szAppName[] = "Recieve";
    HWND        hwnd;
    MSG         msg;
    WNDCLASSEX  wndclass; // obiectul instantiat din structura WNDCLASSEX

    wndclass.cbSize = sizeof(wndclass);//Dimensiunea structurii
    wndclass.style = CS_HREDRAW | CS_VREDRAW; //Stilul ferestrei
    wndclass.lpfnWndProc = WndProc; // Procedura de fereastra care trateaza mesajele
                                    // Doua câmpuri care permit rezervarea de spatiu suplimentar in structura class, respectiv structura window.
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance; //Identificatorul instantei ferestrei
                                    //Stabileste o pictograma pentru toate ferestrele create pe baza clasei window
    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    //Stabileste o pictograma pentru cursor
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    //Specifica culoarea de fundal a ferestrei
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL; // Specifica meniul feresterei
    wndclass.lpszClassName = szAppName; // Specifica numele feresterei
    wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    //Inregistrarea clasei de fereastra
    RegisterClassEx(&wndclass);

    // Crearea ferestrei pe baza clasei de fereastra
    hwnd = CreateWindow(szAppName,         // window class name
        "RecieveMessage",     // window caption
        WS_OVERLAPPEDWINDOW,     // window style
        CW_USEDEFAULT,           // initial x position
        CW_USEDEFAULT,           // initial y position
        CW_USEDEFAULT,           // initial x size
        CW_USEDEFAULT,           // initial y size
        NULL,                    // parent window handle
        NULL,                    // window menu handle
        hInstance,               // program instance handle
        NULL);                   // creation parameters

    ShowWindow(hwnd, iCmdShow); // afiseaza fereastra pe ecran
                                //transmite catre WndProc un mesaj de tip WM_PAINT, care are ca rezultat
                                //redesenarea ferestrei, adica reactualizarea zonei client a ferestrei
    UpdateWindow(hwnd); // 

                        // preia si distribuie mesaje pana se primeste WM_QUIT
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg); // traduce mesajul
        DispatchMessage(&msg); // transmite mesajul catre procedura de fereastra
    }
    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{

    HDC hdc; //contextul grafic
    PAINTSTRUCT ps; // o variabila la structura de desenare
    RECT rect; //obiect dreptunghi
    static char szBufferPaint[MAXLEN] = "Astept datele...", szBufferReceive[MAXLEN];
    PCOPYDATASTRUCT pcs;
    FILE *rFile;
    pcs = (PCOPYDATASTRUCT)lParam;

    switch (iMsg)
    {
    case WM_CREATE: //operatii ce se executa la crearea ferestrei

        return 0;

    case WM_PAINT://operatii ce se executa la desenarea ferestrei
        hdc = BeginPaint(hwnd, &ps); //Obtinerea contextului grafic
        GetClientRect(hwnd, &rect); //Obtinerea suprafeţei de desenare
                                    //Scrierea unui text în fereastră
        DrawText(hdc, szBufferPaint, -1, &rect,
            DT_SINGLELINE | DT_CENTER | DT_VCENTER);
        EndPaint(hwnd, &ps); //Eliberarea contextului grafic
        return 0;

    case WM_COPYDATA:
    {

        rFile = fopen("test.txt", "w");
                pcs = (PCOPYDATASTRUCT)lParam;
                strncpy_s(szBufferReceive, (char*)pcs->lpData, pcs->cbData);
                fputs(szBufferReceive, rFile);
                break;
            CloseHandle(hwnd);
            fclose(rFile);
    }
        return 0;

    case WM_DESTROY://operatii ce se executa la distrugerea ferestrei
        PostQuitMessage(0); // insereaza un mesaj de incheiere in coada de mesaj
        return 0;
    }
    // Alte mesaje sunt trimise catre functia implicita de tratare
    return DefWindowProc(hwnd, iMsg, wParam, lParam);
}

diff --git a/sender.c b/sender.c
index a0a29a3..b5caf62 100644
--- a/sender.c
+++ b/sender.c
@@ -3,9 +3,7 @@
 #include<stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <iostream>
 #include <windows.h>
-using namespace std;
 #define MAXLEN 100

 const int ID_BUTTON = 1;
@@ -128,6 +126,8 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
                 int TimpPornire = LocalTime.wHour * 3600 + LocalTime.wMinute * 60 + LocalTime.wSecond;

                 GetLocalTime(&LocalTime);
+
+                fseek( pFile, 0, SEEK_SET );
                 while ((fgets(mystring, 100, pFile) != NULL))
                 {

@@ -146,7 +146,6 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)

                 }

-                fclose(pFile);
                 CloseHandle(hwnd);

             }
@@ -167,6 +166,7 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)


     case WM_DESTROY://operatii ce se executa la distrugerea ferestrei
+        fclose(pFile);
         PostQuitMessage(0); // insereaza un mesaj de incheiere in coada de mesaje
         return 0;
     }

diff --git a/receiver.c b/receiver.c
index 74434ba..f068661 100644
--- a/receiver.c
+++ b/receiver.c
@@ -3,9 +3,7 @@
 #include<stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <iostream>
 #include <windows.h>
-using namespace std;
 #define MAXLEN 100


@@ -95,13 +93,12 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
     case WM_COPYDATA:
     {

-        rFile = fopen("test.txt", "w");
-                pcs = (PCOPYDATASTRUCT)lParam;
-                strncpy_s(szBufferReceive, (char*)pcs->lpData, pcs->cbData);
-                fputs(szBufferReceive, rFile);
-                break;
-            CloseHandle(hwnd);
-            fclose(rFile);
+        rFile = fopen("test.txt", "a+");
+        pcs = (PCOPYDATASTRUCT)lParam;
+        fputs((char*)pcs->lpData, rFile);
+        fclose(rFile);
+        CloseHandle(hwnd);
+        break;
     }
         return 0;