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Presumably the new FileStream either produces a new error or resets it. Downloads and tools Windows 10 dev tools Visual Studio Windows SDK Windows Store badges Essentials API reference (Windows apps) API reference (desktop apps) Code samples How-to guides (Windows apps) Learning resources Do you really want to analyze the implementation of all calls you do before calling GetLastError? –cremor Jul 29 '13 at 10:22 No, but the first thing to do Use of these codes requires some amount of investigation and analysis. http://imagextension.com/error-code/getlastwin32error-error-code.php

asked 6 years ago viewed 16214 times active 10 months ago Linked 68 How should I use FormatMessage() properly in C++? 2 What are the capitalized text identifiers for Win32 error Here is an example which produces different results: using System.IO; using System.Runtime.InteropServices; public class ForceFailure { [DllImport("kernel32.dll")] public static extern uint GetLastError(); [DllImport("kernel32.dll", SetLastError = true)] private static extern bool SetVolumeLabel(string Scan, search and archive your paper documents. The System Error Codes are very broad. Discover More

Windows Error Codes Lookup

You can cast the error into a textual string by doing the following in C#: string errorMsg = new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error()).Message; This will then return an actual string of the error that The transformation T on the set of all continuous functions that is defined by T(f) = f (1) is a linear transformation. True or False?

Do read my answer for an explanation of why your original code didn't work and why your change here fixes it. If that doesn't work, the file doesn't exist where you think it does. –Ken White Feb 3 '13 at 7:30 @DarrenSadr, as Ken said, a) your file is not That is because some functions call SetLastError with a zero when they succeed, wiping out the error code set by the most recently failed function. Windows Update Error Codes I figured I would quickly post a snippet that you can use in C# to get an actual textual error back instead of just the Windows error code that is returned

Nearly all Win32 APIs (all that take strings at any rate) come in two versions, one that ends in ...A for ANSI (8-bit characters), and one that ends in ...W for Windows Error Codes 0x Here the API in question is ReadFile. See this answer for how it would normally be called from native code. PInvokin' Tom Out.

Word for someone who keeps a group in good shape? Windows Blue Screen Error Codes You'll most likely not find an unreliability problem when developing/testing, but it might blow up in production at any time. Then, I'll see what I can cobble together; this kind of challenge is right up my alley, and somebody threw down a gauntlet. Each one can occur in one of many hundreds of locations in the system.

Windows Error Codes 0x

How to draw a path with coordinates defined by f(x) 5008 out of the box What happens if one brings more than 10,000 USD with them in the US? Note that this code doesn't deal with the annoying newline that Microsoft appends to the error message. Windows Error Codes Lookup To retrieve the description text for the error in your application, use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag. What Is Error Code -50 IQ Puzzle with no pattern Is there any job that can't be automated?

It says nothing about escaping backslashes, which is the proper solution. And if you have specified this attribute then the call to Marshal.GetLastWin32Error will always have the correct value. According to http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx error code 183 means "ERROR_ALREADY_EXISTS". more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Error Code List

However, I tried changing the forward slash to double backslash, and still got the same error. Marshal.GetLastWin32Error was added specifically to make it still possible to work with APIs. –Jonathan Gilbert Aug 19 '15 at 16:32 2 Note that .NET has a guarantee that none of The structure of one of the files containing registry data is corrupted, or the system's memory image of the file is corrupted, or the file could not be recovered because the http://imagextension.com/error-code/getlastwin32error-error-codes.php The return from getlasterror is only valid in this context if readfile returns 0, which you aren't checking for –Alex K.

SetWindowsHookEx Fails Return NULL HHOOK And GetLastError Returns Error Code 1260Do Windows GDI APIs return error code in GetLastError?2How to prevent JNI from overwriting GetLastError()2Is it possible to check if error How To Fix Error Code The code in the question is not the real code. 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.

Occasionally, I get an error code that is not ERROR_SUCCESS (such an odd name).

Check your permissions with your system administrator. ERROR_UNIDENTIFIED_ERROR 1287 (0x507) Insufficient information exists to identify the cause of failure. ERROR_INVALID_CRUNTIME_PARAMETER 1288 (0x508) The parameter passed to a C runtime We appreciate your feedback. You appear to be passing by value. Microsoft Error Codes Windows 10 Why was the identity of the Half-Blood Prince important to the story?

However, some functions also set the last-error code when they succeed. If joining a workgroup, choose another workgroup name. ERROR_BAD_NETPATH 53 (0x35) The network path was not found. ERROR_NETWORK_BUSY 54 (0x36) The network is busy. ERROR_DEV_NOT_EXIST 55 (0x37) The Writing code is more than just changing things till they seem to work; having an understanding of why things don't work or work is important. –BrendanMcK Feb 4 '13 at 21:57 Easy on brain –Sreekar Jun 10 '15 at 6:24 add a comment| up vote 18 down vote MSDN has some sample code that demonstrates how to use FormatMessage() and GetLastError() together:

In other words you must only call it if ReadFile returns FALSE. Now what @Bitterblue found is that these "inserted calls" don't happen often - he couldn't find any. Run it as Admin and try again. The serial driver will unload. ERROR_IRQ_BUSY 1119 (0x45F) Unable to open a device that was sharing an interrupt request (IRQ) with other devices.

changes in the garbage collector), but it doesn't have to. Requirements Minimum supported client Windows XP [desktop apps only] Minimum supported server Windows Server 2003 [desktop apps only] Header WinError.h (include Windows.h) See also System Error Codes     Show: Inherited Protected Print What does the above error status signify in ReadFile() context.? Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you!

I consider Unicode builds the default in modern Win32/C++ code. Anyone Understand how the chain rule was applied here? Join them; it only takes a minute: Sign up How to get the error message from the error code returned by GetLastError()? Multiple threads do not overwrite each other's last-error code.

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