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Marshal.getlastwin32error Error Codes


There are a number of situations where the additional handling required to support managed code can result in extra processing behind the scenes in between two of your statements. Join them; it only takes a minute: Sign up WinApi - GetLastError vs. int le = Marshal.GetLastWin32Error(); return "Unable to get error code string from System - Error " + le.ToString(); } string sRet = Marshal.PtrToStringAnsi(lpMsgBuf); // Free the buffer. Because these codes are defined in WinError.h for anyone to use, sometimes the codes are returned by non-system software. navigate here

But I found no disadvantages of those 2! I thought sure it must be a duplicate by now. –John Saunders Jul 4 '09 at 1:30 add a comment| 6 Answers 6 active oldest votes up vote 10 down vote If you are an end-user that is experiencing difficulty with an application you are installing or running, contact customer support for the software that is displaying the error message. Now if the GC were to execute a failing Win32 call, this would break your call to GetLastError.

Windows Error Codes Lookup

USB in computer screen not working Red balls and Rings 2002 research: speed of light slowing down? You'll most likely not find an unreliability problem when developing/testing, but it might blow up in production at any time. Garbage Collection seems not to call any WinApi functions overwriting the last error code GetLastError is thread-safe.

There is a reply there that says it's okay as long as you're using Marshal.GetLastWin32Error to retrieve the error code. Join them; it only takes a minute: Sign up Where can I find a list of all windows error codes? And this doesn't help me display anything to the user. –Malfist Oct 30 '09 at 17:22 1 How does this answer the OP's question? –SepehrM Jul 23 '14 at 8:02 Windows Update Error Codes Each one can occur in one of many hundreds of locations in the system.

Except for a couple of braindead API/situation combinations, like Impersonate* with the new SeImpersonatePrivilege: the API can return a success code even if it fails due to lack of privilege, leaving Windows Error Codes 0x We appreciate your feedback. Use of these codes requires some amount of investigation and analysis. https://msdn.microsoft.com/en-us/library/windows/desktop/ms681385(v=vs.85).aspx Function Signature [DllImport("dxva2.dll", EntryPoint = "GetMonitorCapabilities", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool GetMonitorCapabilities( IntPtr hMonitor, ref uint pdwMonitorCapabilities, ref uint pdwSupportedColorTemperatures); Console.WriteLine(Marshal.GetLastWin32Error()); NativeMethods.GetMonitorCapabilities(hnd,ref x,ref y); Console.WriteLine(Marshal.GetLastWin32Error()); The above

As others have said, there is no way to get those capitalized, underscored names, short of looking them up in winerror.h, which I have seen reproduced online in various places where Windows Blue Screen Error Codes Equation which has to be solved with logarithms How to create a company culture that cares about information security? Notes: I like using ATL/MFC CString in Win32 code, I find it very convenient This code is designed for Unicode builds, e.g. They refer to constant names from winerror.h, a C++ include file provided in the Windows SDK. –Adi Inbar May 18 '15 at 15:46 add a comment| up vote 1 down vote

Windows Error Codes 0x

How to deal with a coworker who is making fun of my work? From what I understand the dllimport thing is well designed in .NET and the use of GetLastError is save although people try to scare you off using it. –Bitterblue Jul 30 Windows Error Codes Lookup share|improve this answer answered Oct 9 '15 at 21:53 David A. What Is Error Code -50 Thanks for the heads up, fixed it in my own code base (and my answer).

Difficult limit problem involving sine and tangent What do aviation agencies do to make waypoints sequences more easy to remember to prevent navigation mistakes? check over here Please try again when your computer is not in Safe Mode or you can use System Restore to return your machine to a previous good state. ERROR_FAIL_FAST_EXCEPTION 1653 (0x675) A since when would GC run in my threads ? Some compilable code of mine follows. Error Code List

SaveMySerials - Protect yourself from theft, fire, natural disasters and more by recording your serial numbers My Music To Me - Stream your subsonic music collection to your Sonos wireless system Thus, if you make a call to a P/Invoke function with SetLastError = true, and you do no other P/Invoke calls on the same thread (which also means not calling library So you could actually change the code to the following to get the same result: if (SetVolumeLabel("XYZ:\\", "My Imaginary Drive ")) System.Console.WriteLine("It worked???"); else throw new his comment is here See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> Developer resources Microsoft developer Windows Windows Dev Center Windows

Developer resources Microsoft developer Windows Windows Dev Center Windows apps Desktop Internet of Things Games Holographic Microsoft Edge Hardware Azure Azure Web apps Mobile apps API apps Service fabric Visual Studio Windows Error Codes List If managed code calls such a method, it will not get reliable results. Etymologically, why do "ser" and "estar" exist?

You could also do the same thing with PInvoke by calling the FormatMessage function, but I am lazy and keep as much in C# as I can.

Join them; it only takes a minute: Sign up How to get the error message from the error code returned by GetLastError()? It can come from a message table resource in an already-loaded module. Check MSDN to find out which ones do and which don't. 2) Even if an API supports SetLastError/GetLastError, the value returned by GetLastError is only meaningful if the API you just How To Fix Error Code Soft question: What exactly is a solver in optimization?

It forces a failure by passing an invalid drive name (XYZ) to the SetVolumeLabel API: using System.Runtime.InteropServices; public class ForceFailure { [DllImport("kernel32.dll", SetLastError=true)] static Therefore, never define a PInvoke signature for GetLastErrorfrom kernel32.dll. share|improve this answer answered Jan 21 '15 at 19:23 Mr.C64 19.3k64181 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign http://threadspodcast.com/error-code/marshal-getlastwin32error-error-message.html share|improve this answer answered Sep 7 '09 at 0:10 Jonathan Graehl 7,3042335 add a comment| up vote 9 down vote In general, you need to use FormatMessage to convert from a