Dll Error Handling
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. C/C++ Building Reference Linking Linker Support for Delay-Loaded DLLs Linker Support for Delay-Loaded DLLs Error Handling and Notification Error Handling and Notification Error Handling and Notification Specifying DLLs to Delay Load Explicitly Unloading a Delay-Loaded DLL Binding Imports Loading All Imports for a Delay-Loaded DLL Error Handling and Notification Notification Hooks Failure Hooks Exceptions Dumping Delay-Loaded Imports Constraints of Delay Loading DLLs Understanding the Helper Function Developing Your Own Helper Function TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Error Handling and Notification Visual Studio 2015 Other Versions Visual Studio 2013 Visual Studio 2012 Visual Studio 2010 Visual Studio 2008 Visual Studio 2005 Visual Studio .NET 2003 For more information on error handling and notification, see Understanding the Helper Function.For more information on hook functions, see Structure and Constant Definitions.If your program uses delay-loaded DLLs, it must handle errors robustly since failures that occur while the program is running will result in unhandled exceptions. Failure handling is comprised of two portions: Recovery through a hook. If your code needs to recover or provide an alternate library and/or routine on failure, a hook can be provided to the helper function that can supply or remedy the situation. The hook routine needs to return a suitable value, so that processing can continue (an HINSTANCE or FARPROC) or 0 to indicate that an exception should be thrown. It could also throw its own exception or longjmp out of the hook. There are notification hooks and failure hooks.Reporting via an exception. If all that is necessary for handling the err
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with Twitter Sign in with LinkedIn Sign Up All Content All Content This https://lavag.org/topic/13146-dll-error-handling/ Topic This Forum Advanced Search Browse Forums Downloads Gallery Staff Online Users More Activity All Activity My Activity Streams Unread Content Content I Started Search More More More http://programmers.stackexchange.com/questions/276548/proper-exception-handling-throwing-message-dll-libary All Activity Home Software & Hardware Discussions LabVIEW (By Category) Calling External Code DLL Error Handling Sign in to follow this Followers 1 DLL Error Handling Started dll error by vugie, September 24, 2010 10 posts in this topic vugie 153 Extremely Active Members 153 388 posts Location:Warsaw, Poland Version:LabVIEW 2009 Since:2006 Posted September 24, 2010 I'm making wrappers for certain open source library (DLL). It has its own error handling: each time when an error appears special Error() function is called dll error handling with error number and message as arguments. It looks like that: void Error(int errnum, char *msg){ if (custom error handler defined) custom_error_handler(errnum, msg) else DisplayDialog(errnum,msg); abort();} The problem is that LabVIEW crashes each time library calls Error() function. At first dialog with error number appears (as it should), then after clicking OK windows dialog "application unexpectly quit", everything hangs for a while and LV IDE disappears... I think that abort() is not LV friendly. I compile the library myself, but due to maintenance and licensing issue I don't want to modify its code. I would rather like to create my custom error handler (there is a SetErrorHandler function which gets a pointer to it), which would exit somehow more softly. I'm already able to build another DLL with error handler an to provide its pointer to SetErrorHandler (using GetProcAddress function of Kernel32.dll). But how to exit softly and provide error information up to LV wrapper? Maybe is there a way to compi
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Programmers Questions Tags Users Badges Unanswered Ask Question _ Programmers Stack Exchange is a question and answer site for professional programmers interested in conceptual questions about software development. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top proper exception handling (throwing/message) dll libary up vote 0 down vote favorite I just wrote a dll library using vb.net. while testing, i got an error which i did not initially use a try-catch block. The code is Try 'The first four bytes are for the Command _Command = DirectCast(BitConverter.ToInt32(data, 0), Commands) 'The next four store the length of the name Dim nameLen As Integer = BitConverter.ToInt32(Data, 4) 'The next four store the length of the message Dim msgLen As Integer = BitConverter.ToInt32(Data, 8) 'This check makes sure that ClientName has been passed in the array of bytes If nameLen > 0 Then _ClientName = Encoding.UTF8.GetString(Data, 12, nameLen) Else _ClientName = Nothing End If 'This checks for a null message field If msgLen > 0 Then _Message = Encoding.UTF8.GetString(data, 12 + nameLen, msgLen) <-- this is the error line Else _Message = Nothing End If Catch ex As Exception Throw End Try The error is Index and count must refer to a location within the buffer. Parameter name: bytes My question now is would it be considered good practice to throw errors from dll or return an error message to the client. My client is expecting an array if bytes as resp