创建指定大小的空文件

BOOL CreateFileDemo(TCHAR* pFileName, DWORD dwSize)
{
    HANDLE hFile;
    HANDLE hMapFile;

    hFile = CreateFile(
        pFileName,
        GENERIC_WRITE | GENERIC_READ,
        FILE_SHARE_READ,
        NULL,
        CREATE_ALWAYS,
        FILE_ATTRIBUTE_NORMAL,
        NULL
        );
    if( hFile == INVALID_HANDLE_VALUE )
    {
        OutputDebugString(_T("CreateFile fail!/r/n"));
        return FALSE;
    }

    hMapFile = CreateFileMapping(
        hFile,
        NULL,
        PAGE_READWRITE,
        0,
        dwSize,
        NULL
        );
    if( hMapFile == NULL )
    {
        OutputDebugString(_T("CreateFileMapping fail!/r/n"));
        CloseHandle( hFile );
        return FALSE;    
    }

    CloseHandle( hMapFile );
    CloseHandle( hFile );

    return TRUE;
}