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Hresult Formatmessage

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Join them; it only takes a minute: Sign up How to convert HRESULT into an error description? [duplicate] up vote 2 down vote favorite This question already has an answer here: Click the + button, click the number 1 button, then click the = button to add one. But as long as you are making a winapi call, you should only expect to get a winapi error code and make no attempt to translate it yourself. Then, you can call the member function, _com_error::ErrorMessage() and get the corresponding system error message, quite naturally.

For me personally, even as far back as VC5, this has never been my experience, and _com_error::ErrorMessage() appears to work regardless of whether you use the HRESULT_FROM_WIN32 macro or not. Now that you understand how the HRESULT_FROM_WIN32 macro works, you can answer this question, based on an actual customer question: Sometimes, when I import data from a scanner, I get the It's impossible to write that function since the mapping provided by the HRESULT_FROM_WIN32 function is not one-to-one. And it's true that there may be application types for which this approach is unsuitable. https://blogs.msdn.microsoft.com/oldnewthing/20061103-07/?p=29133

Hresult Formatmessage

In you example "The system cannot find the file specified" is not terribly helpful. 100 different files may have been specified! "Class not registered" is even more cryptic! Networking 2100–2999 Cluster 5000–5999 Traffic Control 7500–7999 Active Directory 8000–8999 DNS 9000–9999 Winsock 10000–11999 IPSec 13000–13999 Side By Side 14000–14999 There is room for only 65535 Win32 error codes, and over The short answer: No.

The best place to put these GUID declarations is in the same source file that I am going to call CoCreateInstance() in. Also there is a API called FormatMessage, which helps in translating an error code to it's description. It can be wrapped in an HRESULT, simply 0x80070000 + error. Print Hresult C++ In a pudding I eat, I give bread its potential Is the following sentence correct? 'The time when the church dates back to is the 13th.' * Cycles, shade based on

I assume that _com_error is somewhat thread-safe since it is designed to also be thrown as an exception type. Convert Hresult To String You can cheat by pretending the dependency doesn't really exist (which is what vc++ used to do with resource files). Hmm. –c00000fd Mar 6 '14 at 19:21 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted This is the helper function we use in-house to http://stackoverflow.com/questions/25566234/how-to-convert-specific-ntstatus-value-to-the-hresult A few words about passing GetLastError() as an argument...

Another upside of using _com_error natively is that the system error messages are automatically localized so that they appear in the language that the computer's locale is using. Hresult Facility Codes What’s new in Visual Studio 2012 Solution Explorer MFC Feature Pack Tutorial - Part 2 - CMFCPropertySheet MFC Feature Pack Tutorial - Part 3 - CMFCPropertyGridCtrl MFC Feature Pack Tutorial - Arabic — what are the differences? Instead, you had to request each ID individually.

Convert Hresult To String

The facility defines how to interpret the error code. Sign In·ViewThread·Permalink conversion error when compiling ehaerim23-Dec-07 22:44 ehaerim23-Dec-07 22:44 In an ATL COM project, if (FAILED(hr)) { ::MessageBox(NULL, _com_error(hr).ErrorMessage, _T("FinalConstruct"), MB_ICONSTOP); } cause the following error message and I Hresult Formatmessage Brian Hart31-Dec-05 15:43 Brian Hart31-Dec-05 15:43 Hans Dietrich wrote:After reading so many poor or useless articles, it is pleasure to read yours, which actually provides new information (I was not aware Hresult Values Win32 Error Codes up vote 2 down vote favorite 2 I am know NTSTATUS that i will get in case of specific error, but i got hresult, not ntstatus from pinvoke.

HRESULT values are often used to return error information that is not specifically considered error codes. More modern Windows COM subsystems will often provide extensive error information in the message description of the IErrorInfo object. Dean Harris16-Jul-07 18:16 Dean Harris16-Jul-07 18:16 You can do that, e.g.: puts(_com_error(WSAENOTSOCK).ErrorMessage()); Sign In·ViewThread·Permalink That is great! Detailed instructions for the number conversions that are often necessary when working with HRESULTs is also provided. Convert Ntstatus To Win32 Error

Arab vs. NTSTATUS « JP's Blog says: November 25, 2007 at 2:05 pm PingBack from http://jpassing.wordpress.com/2007/08/20/error-codes-win32-vs-hresult-vs-ntstatus/ Comments are closed. Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine Sign In·ViewThread·Permalink Re: Common Gotcha's with GetLastError() Karim AM16-Jan-06 16:05 Karim AM16-Jan-06 16:05 I disagree with Doug So you should prefer: if( !::SomeWin32API( ... ) )
{
// Get the cached error
DWORD nError = ::GetLastError();

// Now handle the error

The only 100% reliable way of calling GetLastError() is on a line by itself, immediately after the WIN32 API call. _com_error Linux questions C# questions ASP.NET questions fabric questions SQL questions discussionsforums All Message Boards... If you import a COM type library in C++ and call methods on the generated smart pointers they always throw _com_error when something goes wrong, so having a catch handler that

James says: November 4, 2006 at 3:44 pm Yes, Andy, there's an extension for Firefox (IETab) which opens pages in IE.

the number is non-negative) or use the FAILED() macro. Get the error: Read it off the error message (someone else's code) Read the error from the Event Log (someone else's code) Call GetLastError() in your code. Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine Sign In·ViewThread·Permalink Re: One problem this article does not solve. Make_hresult John Burnett says: November 3, 2006 at 11:55 am Did VML kick that commenter's dog and run off with his wife?

It turns out there's an even simpler approach, and one that will look up the error value, and parse it, and display the corresponding string (if found) in a message box, Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine Sign In·ViewThread·Permalink How do you correct this AlexEvans2-Jan-06 15:33 AlexEvans2-Jan-06 15:33 Nice work Brian Do intend to James says: November 5, 2006 at 4:28 am "And as I noted in the posting, text files don't have version resources." True, for now; on the other hand, a decade ago In your post, you where talking about implementing an inverse for the macro HRESULT_FROM_WIN32 - this is no problem at all if the macro is used as it is intended (with