Работа с файлами через WinApi

if (temp)
    {
        mfile = CreateFile(TEXT("D:\\new\\list.txt"), GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
        ReadFile(mfile, Buffer, FileSize, &dw2, NULL);
        cout<<"Buffer: "<<endl<<Buffer<<endl;}

if (temp)
    {
        mfile = CreateFile(TEXT("D:\\new\\list.txt"), GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
        FileSize = GetFileSize(mfile, NULL);
        ReadFile(mfile, Buffer, FileSize, &dw2, NULL);
        Buffer[FileSize/sizeof(char)]='\0';
        cout<<"Buffer: "<<endl<<Buffer<<endl;}

HANDLE hFile;
    if (INVALID_HANDLE_VALUE==(hFile=CreateFile("D:\\new\\list.txt",
        GENERIC_READ, FILE_SHARE_READ,
        NULL, OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,NULL)))
        cout<<"Can't open file\n";
    DWORD dwBytes=0, BufSize=0;
    BufSize = GetFileSize(hFile, NULL);
    char *Buffer = new char[BufSize/sizeof(char)];
    ReadFile(hFile,Buffer,BufSize,&dwBytes,NULL);
    Buffer[BufSize/sizeof(char)]='\0';
    cout<<Buffer<<endl;
    CloseHandle(hFile);

#include <iostream>
#include <windows.h>
using namespace std;

hFile = FindFirstFile(_T("D:\\new\\list1.txt"), &wfd);
    if (hFile != INVALID_HANDLE_VALUE)
        cout<<"olololo"<<endl;
    FindClose(hFile);

#include <iostream>
#include <windows.h>
#include <tchar.h>
using namespace std;
 
int main(){
    WIN32_FIND_DATA FindFileData;
    HANDLE hFind;
    hFind = FindFirstFile(("*.txt"), &FindFileData);
    if (hFind == INVALID_HANDLE_VALUE) {
        cout<<"FindFirstFile failed"<<GetLastError();
        system("pause");
        return 1;
    } 
    do{
        char *t;t=FindFileData.cFileName;
        cout<<"The first file found is "<<t<<endl;
    }while (FindNextFile(hFind,&FindFileData));
    FindClose(hFind);
    system("pause");
    return 0;
}

char *t;

WCHAR *t