windows C++ 将系统错误码转换为字符串

std::string GetLastErrorAsString() {
	DWORD errorCode = GetLastError();
	if (errorCode == 0) {
		return "No error.";
	}
	LPSTR messageBuffer = nullptr;
	size_t size = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		nullptr, errorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, nullptr);
	std::string message(messageBuffer, size);
	LocalFree(messageBuffer);
	return message;
}


std::string GetHRESULTErrorAsString(HRESULT hr) {
	if (SUCCEEDED(hr)) {
		return "No error.";
	}
	LPSTR messageBuffer = nullptr;
	size_t size = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		nullptr, hr, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, nullptr);
	std::string message(messageBuffer, size);
	LocalFree(messageBuffer);
	return message;
}


std::string GetLSTATUSAsString(LSTATUS errorCode) {
	if (errorCode == ERROR_SUCCESS) {
		return "No error.";
	}
	LPSTR messageBuffer = nullptr;
	size_t size = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		nullptr, errorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, nullptr);
	std::string message(messageBuffer, size);
	LocalFree(messageBuffer);
	return message;
}