FormatMessage返回一个字符*,每个字符之间包含null。。。为什么?

当翻译错误消息时,我会返回一个指向字符串(pMsgBuf)的指针,如下所示

pMsgBuf = "T\0h\0e\0 \0s\t\0r\0a\0...."

消息在那里,但用null分隔。它一定是我传递给Format Message的一个参数,但不知道如何修复它。

{
char* pMsgBuf;
// windows will allocate memory for err string and make our pointer point to it

const DWORD nMsgLen = FormatMessage(
    FORMAT_MESSAGE_ALLOCATE_BUFFER |
    FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
    nullptr, hr, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
    reinterpret_cast<LPWSTR>(&pMsgBuf), 0, nullptr
);
// 0 string length returned indicates a failure
if (nMsgLen == 0)
{
    return "Unidentified error code";
}
char joe[100]{};
for (int i = 0, y = 0; i < nMsgLen *2; i++)
{
if (pMsgBuf[i] != '\0')
    joe[y++] = pMsgBuf[i];
    
}
// copy error string from windows-allocated buffer to std::string
std::string errorString = pMsgBuf;
// free windows buffer
size_t size = sizeof(pMsgBuf);
LocalFree(pMsgBuf);
return errorString;

}

Test code with watch active

应该返回字符串指针,并不是每个字符都有null。

创建了一个测试块来确认这就是我从格式化消息中得到的内容。

 char joe[100]{};
    for (int i = 0, y = 0; i < nMsgLen *2; i++)
    {
if (pMsgBuf[i] != '\0')
    joe[y++] = pMsgBuf[i];

     }    

果不其然,乔把绳子解开了。