从ReadFileEx使用CreateFile的有效句柄无效的句柄错误

Question

我遇到的问题：CreateFile返回一个0x194的句柄。 ReadFileEx说这个句柄是无效的。 （错误6.）任何想法？传入的参数是“C：\ testfile.txt”，这是我在记事本中创建的有效文本文件。尽管是过去12年来的C++程序员，但这是我第一次用“windows.h”或线程编写任何东西。

#include "stdafx.h" 
#include "stdio.h" 
#include "windows.h" 

using namespace System; 

int main(int argc, char **argv) 
{ 
    if (argc != 2) 
    { 
     printf("To display a file, you must enter the filename as the only command argument."); 
     scanf("\n"); 
     return 0; 
    } 
    HANDLE file; 
    int nameLen = (strlen(argv[1]) + 1); 
    wchar_t *filename = new wchar_t[nameLen]; 
    if (filename == 0) 
    { 
     printf("To display a file, you must enter the filename as the only command argument."); 
     scanf("\n"); 
     return 0; 
    } 
    memset(filename, 0, nameLen); 
    ::MultiByteToWideChar(CP_ACP, NULL, argv[1], -1, filename, nameLen); 
    file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 
    if (file == NULL) 
    { 
     printf("A valid filename is required."); 
     scanf("\n"); 
     return 0; 
    } 
    char *buffer; 
    buffer = new char[1024]; 
    OVERLAPPED overlapped; 
    overlapped.Offset = overlapped.OffsetHigh = 0; 
    ReadFileEx(file, &buffer, 1024, &overlapped, NULL); 
    WaitForSingleObject(&file, 0); 
    if (GetLastError() != ERROR_SUCCESS) 
    { 
     printf("A valid file is required., Error: %d", GetLastError()); 
     scanf("\n"); 
     return 0; 
    } 
    printf("%s", buffer); 
    scanf("\n"); 
    delete buffer; 
    return 0; 
} 

Answer 1

我的猜测是改变
ReadFileEx(&file, &buffer, 1024, &overlapped, NULL);
到
ReadFileEx(file, &buffer, 1024, &overlapped, NULL);