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Marshal.getlastwin32error Error Message

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For instance, could construction of the "Error" string overwrite "Marshal.GetLastWin32Error()" on failure given that it might also call into the WinAPI. Thanks very much for your help. To obtain an error string for system error codes, use the FormatMessage function. Return value The return value is the calling thread's last-error code. http://threadspodcast.com/error-code/marshal-getlastwin32error-error-codes.html

For instance, could construction of the "Error" string overwrite "Marshal.GetLastWin32Error()" on failure given that it might also call into the WinAPI. If you're using VB.Net, Err.LastDllError is also an acceptable way of accessing the last error code. To say it in other words: Between your Win32 call which sets the error, the CLR may "insert" other Win32 calls which could overwrite the error. USB in computer screen not working Can an umlaut be written as a line in handwriting? Read More Here

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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 Different precision for masses of moon and earth online What is the difference (if any) between "not true" and "false"? Consequently the descriptions of these codes cannot be very specific.

Bit 29 is reserved for application-defined error codes; no system error code has this bit set. This is important for you C++ programmers out there, so I hope you're still reading! Previous company name is ISIS, how to list on CV? Windows Error Codes List Catch ex As COMException New ComponentModel.Win32Exception(CType(ex, Runtime.InteropServices.COMException).ErrorCode).Message End Try Reply Follow UsPopular TagsSecurity CAS Cryptography Under the Hood Windows StrongName Policy Other ClickOnce Pages Debugging XML Visual Studio CLR v4 SSCLI

Can the value returned by this function be modified by the call to the exception constructor itself. Windows Error Codes Lookup share|improve this answer answered Jul 29 '13 at 7:57 cremor 4,7941344 I checked GC but can't see any problem yet. This documentation is archived and is not being maintained. https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

You'll most likely not find an unreliability problem when developing/testing, but it might blow up in production at any time. Marshal Getlastwin32error C# Console.WriteLine("Calling Win32 MessageBox without error..."); Win32.MessageBox(new IntPtr(0), "Press OK...", "Press OK Dialog", 0); // Get the last error and display it. Referee did not fully understand accepted paper Gender roles for a jungle treehouse culture Were students "forced to recite 'Allah is the only God'" in Tennessee public schools? May 8 '07 #5 This discussion thread is closed Start new discussion Replies have been disabled for this discussion.

Windows Error Codes Lookup

Browse other questions tagged c# winapi marshalling unmanaged managed or ask your own question. The content you requested has been removed. Windows Error Code If you are defining an error code for your application, set this bit to one. Windows Error Codes 0x 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

Dev centers Windows Office Visual Studio Microsoft Azure More... have a peek at these guys 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 Marshal.GetLastWin32Error Method () .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 Silverlight Visual Studio 2008 .NET Framework 3.5 .NET Framework 3.0 .NET Framework 2.0 .NET Framework 1.1 I can imagine that a lot of software is running with the simple GetLastError because the programmer haven't heard of Marshal.GetLastWin32Error or whatever. Error Code List

See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> | Search MSDN Search all blogs Search this blog Asking for a written form filled in ALL CAPS I cannot figure out how to go about syncing up a clock frequency to a microcontroller What could make an area of See this answer for how it would normally be called from native code. check over here The process for this varies depending upon the source language used: C# and C++ are false by default, but the Declare statement in Visual Basic is true.ExamplesThe following example demonstrates calling

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed What Is Error Code -50 This would be particularly true if a non-trivial expression is used to create the string in the first place (at the point of call). Making the update you mentioned would break all those software. –Bitterblue Jul 31 '13 at 7:20 Maybe this is not convincing example...

since when would GC run in my threads ?

Here's a C# example thatretrieves the last error correctly. There is a reply there that says it's okay as long as you're using Marshal.GetLastWin32Error to retrieve the error code. This would be a problem in C++ for instance where you can't depend on the order of the parameters being passed (i.e., you can't reliably pass "GetLastError()" as the first arg Getlastwin32error Message Use of these codes requires some amount of investigation and analysis.

There are also many functions whose documentation does not include even a partial list of error codes that can be returned. 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 May 8 '07 #3 P: n/a Nicholas Paldino [.NET/C# MVP] Larry, The GetLastWin32Error method will only return the value of GetLastError for P/Invoke calls, not for CLR internal calls (as the this content Where are sudo's insults stored?

See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> | Search MSDN Search all blogs Search this blog Then, I'll see what I can cobble together; this kind of challenge is right up my alley, and somebody threw down a gauntlet. If you want to access this error code, you must call GetLastWin32Error instead of writing your own platform invoke definition for GetLastError and calling it. C#VB Copy using System; using System.Runtime.InteropServices; internal class Win32 { // Use DllImportAttribute to inport the Win32 MessageBox // function.

Presumably the new FileStream either produces a new error or resets it. The common language runtime can make internal calls to APIs that overwrite the GetLastError maintained by the operating system. public class ForceFailure { [DllImport("kernel32.dll")] static extern uint GetLastError(); [DllImport("kernel32.dll", SetLastError = true)] static extern bool SetVolumeLabel(string lpRootPathName, string lpVolumeName); public static void Main() { if (SetVolumeLabel("XYZ:\\", "My Imaginary Drive ")) You should call the GetLastError function immediately when a function's return value indicates that such a call will return useful data.

Garbage Collection seems not to call any WinApi functions overwriting the last error code GetLastError is thread-safe.