c++ - 如何在 VC++ 2010 中使用 GetLastError()

Question

从 Java 到 C++ 的转换并不容易，所以请帮助我。

我想看看我是否在这段代码中遇到了 Access_Error 冲突:

BOOL didThisFail = FALSE;

if (CopyFile(L"MyApplication.exe", szPath, didThisFail))
    cout << "File was copied" << endl;

Answer 1

if (CopyFileW(L"MyApplication.exe", szPath, didThisFail))
{
    std::cout << "File was copied" << std::endl;
}
else if (GetLastError() == ERROR_ACCESS_DENIED)
{
    std::cout << "Can't do that." << std::endl;
}
else
{
    DWORD lastError = GetLastError();
    //You have to cache the value of the last error here, because the call to
    //operator<<(std::ostream&, const char *) may cause the last error to be set
    //to something else.
    std::cout << "General failure. GetLastError returned " << std::hex
    << lastError << ".";
}