On Error Handling Vb6
Contents |
Database Guide User login Username: * Password: * Request new password Home › Tutorials Error Handling In Visual Basic Level: Despite your best efforts to cover all possible contingencies, run-time on error vba errors will occur in your applications. You can and should do all you
On Error Goto Line
can to prevent them, but when they happen you have to handle them. Introduction Trapping Errors at Run-Time Building
Vba Error Handling Best Practices
Error Handlers Raising Your Own Errors Summary Introduction The various functions, statements, properties and methods available in Visual Basic and the components used in Visual Basic expect to deal with certain types
On Error Goto 0
of data and behavior in your applications. For example, the CDate() function can convert a value to a Date variable. The function is remarkably flexible in the type of information it can accept, but it expects to receive data that it can use to derive a date. If you provide input that it can't convert, it raises error number 13 - "Type mismatch" - essentially vb6 error handling best practice saying "I can't handle this input data." In an application, this type of error may be a program logic error (you simply passed the wrong data) or it may be a data entry error on the part of the user (you asked for a date and the user typed a name). In the first case, you need to debug the program to fix the mistake. However, there is no way for you to anticipate the behavior of the end users of the application. If the user enters data you can't handle, you need to deal with the situation. Dealing with errors at run-time is a two step process: Trap the Error Before you can deal with an error, you need to know about it. You use VB's On Error statement to setup an error trap. Handle the Error Code in your error handler may correct an error, ignore it, inform the user of the problem, or deal with it in some other way. You can examine the properties of the Err object to determine the nature of the error. Once the error has been dealt with, you use the Resume sta
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 vba on error goto 0 this site About Us Learn more about Stack Overflow the company Business vb6 runtime error -2147467259 Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask vba error numbers Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://www.vb6.us/tutorials/error-handling up what is the better way to handle errors in VB6 up vote 12 down vote favorite 6 I have VB6 application , I want to put some good error handling finction in it which can tell me what was the error and exact place when it happened , can anyone suggest the good way to do this vb6 error-handling share|improve this question http://stackoverflow.com/questions/116289/what-is-the-better-way-to-handle-errors-in-vb6 edited Sep 22 '08 at 17:36 Onorio Catenacci 9,08275387 asked Sep 22 '08 at 17:34 RBS 1,30692330 I removed the "in" tag. –Onorio Catenacci Sep 22 '08 at 17:36 I also changed the two separate "error" and "handling" tags to "error-handling" –Onorio Catenacci Sep 22 '08 at 17:37 add a comment| 7 Answers 7 active oldest votes up vote 2 down vote accepted ON ERROR GOTO and the Err object. See this discussion. share|improve this answer answered Sep 22 '08 at 17:42 Joe Skora 8,99142430 add a comment| up vote 27 down vote First of all, go get MZTools for Visual Basic 6, its free and invaluable. Second add a custom error handler on every function (yes, every function). The error handler we use looks something like this: On Error GoTo {PROCEDURE_NAME}_Error {PROCEDURE_BODY} On Error GoTo 0 Exit {PROCEDURE_TYPE} {PROCEDURE_NAME}_Error: LogError "Error " & Err.Number & " (" & Err.Description & ") in line " & Erl & _ ", in procedure {PROCEDURE_NAME} of {MODULE_TYPE} {MODULE_NAME}" Then create a LogError function that logs the error to disc. Next, before you release
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss http://stackoverflow.com/questions/9035664/confused-about-error-handling-in-vb6-and-the-use-of-on-error-goto the workings and policies of this site About Us Learn more about http://stackoverflow.com/questions/2091787/vb6-how-to-catch-exception-or-error-during-runtime Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each on error other. Join them; it only takes a minute: Sign up Confused about Error Handling in VB6 and the use of On Error GoTo up vote 3 down vote favorite 1 I'm needing to troubleshoot some old VB6 code and I'm confused about the use of "On Error". In the sample below, if I surround the specific line of code on error goto I want to test with the On Error GoTo and the ErrHandler1, is that the ONLY line that's tested. Or will the divide by Zero be included if it's in the same Sub? On Error GoTo ErrHandler1 If Not Exists(BaseDirectory + "\ARCHIVE") Then _ MkDir BaseDirectory + "\ARCHIVE" ErrHandler1: Call MsgBox(Err.Number & vbCrLf & Err.Description, vbExclamation, App.Title) intValue1 = 12 intValue2 = 0 intValue3 = intValue1 / intValue Thanks. vb6 error-handling share|improve this question asked Jan 27 '12 at 15:25 JimDel 2,05453369 add a comment| 3 Answers 3 active oldest votes up vote 8 down vote accepted The divide by zero will be included and handled, and it will probably create a loop in your sample... The correct approach is like that On Error GoTo ErrHandler1 If Not Exists(BaseDirectory + "\ARCHIVE") Then _ MkDir BaseDirectory + "\ARCHIVE" On Error Goto 0 'this will un-hook you error handler intValue1 = 12 intValue2 = 0 intValue3 = intValue1 / intValue 'this will be an un-managed error Exit Sub 'this make sure that msgbox is sho
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 Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up VB6 - How to catch exception or error during runtime up vote 2 down vote favorite I developed an application in VB6. In client's environment it raises runtime errors which I can't reproduce under debugger. Is there any way to get the stacktrace or location of error? I created log file and I used Err.Description,Err.Source but it gives blank values. Please help me. my method(...... On Error GoTo Error_Handler ......... Error_Handler : writeToLogFile(Err.Source,Err.Description) vb6 error-handling share|improve this question edited Jan 19 '10 at 7:39 asked Jan 19 '10 at 7:23 Royson 79691743 You probably know this, but just in case, VB6 is completely unsupported as of March 2008: msdn.microsoft.com/en-us/vbrun/ms788707.aspx I'm guessing you're providing legacy support or something. –T.J. Crowder Jan 19 '10 at 7:31 @T.J. Crowder. That's not completely correct. The VB6 IDE is unsupported but the VB6 runtime is supported for the full support lifetime of Windows 7, which is until about 2019 msdn.microsoft.com/en-us/vbrun/ms788708.aspx –MarkJ Jan 19 '10 at 8:56 @MarkJ: Very useful distinction indeed, thank you. @OP and other readers: If you don't read the link, just be clear that when they say the IDE, that includes the compiler (e.g., the compiler has been unsupported for more than a year and a half); it's the runtime that will continue to be supported through Windows 7 (but not, they say explicitly in that article, beyond that). Cheers again, Mark. –T.J. Crowder Jan 19 '10 at 13:07 @T.J. Crowder. Me again, sorry! The article says "there are no plans to include VB6 runtime in future versions of Windows beyond Windows 7". IMHO that doesn't say they definitely won't support it beyond Windows 7. It just says they haven't made their minds up yet, but in a way that's calculated t