Windows核心编程一错误处理

转载于 2015-01-04 15:19:51 发布 · 367 阅读

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#C++ #错误处理

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本文演示了如何使用C++在Windows环境下读取并解析错误代码，获取对应的错误信息描述，并展示了创建文件的基本方法及失败后的错误处理流程。

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DWORD iErrorValue;
while(std::cin>>iErrorValue)
{
HLOCAL hlocal = NULL; // Buffer that gets the error message string

// Use the default system locale since we look for Windows messages.
// Note: this MAKELANGID combination has 0 as value
DWORD systemLocale = MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL);

// Get the error code's textual description
BOOL fOk = FormatMessage(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_ALLOCATE_BUFFER,
NULL, iErrorValue, systemLocale,
(PTSTR) &hlocal, 0, NULL);

const WCHAR *errString = (PCTSTR)LocalLock(hlocal);
std::wstring wsError(errString);
LocalFree(hlocal);
}

HANDLE hFile = CreateFile(TEXT("C:\\jeff"), 0, 0 , NULL, OPEN_EXISTING, 0, NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
std::cout<<"Create file failed\n";
}
DWORD iErrValue = GetLastError();
std::cout<<iErrValue<<std::endl;
return 0;