On Error Goto Errorhandler Vb6
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On Error Goto Line
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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 Confused about Error Handling in VB6 and the use of vba on error goto 0 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 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 vba error handling best practices 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 shown only when the error happens ErrHandler1: Call MsgBox(Err.Number & vbCrLf & Err.Description, vbExclamation, App.Title) share|improve this answer answered Jan 27 '12 at 15:48 Max 4,23511426 Thanks for the explanation! –JimDel Jan 27 '12 at 16:47 +1. The documentation explains this pretty clearly... msdn.microsoft.com/en-us/library/aa266173(v=vs.60).aspx –MarkJ Jan 27 '12 at 16:53 3 Wrong - the divis
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other. Join them; it only takes a minute: Sign 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 http://stackoverflow.com/questions/9035664/confused-about-error-handling-in-vb6-and-the-use-of-on-error-goto 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 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 http://stackoverflow.com/questions/116289/what-is-the-better-way-to-handle-errors-in-vb6 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 code add Line Numbers to every function (this is also built into MZTools). From now on you will know from the Error Logs everything that happens. If possible, also, upload the error logs and actually examine them live from the field. This is about the best you can do for unexpected global error handling in VB6 (one of its many defects), and really this should only be used to find unexpected errors. If you know that if there is the possibility of an error occurring in a cer
Database Guide User login Username: * Password: * Request new password Home › Tutorials Error handling in Visual Basic Level: Error handling is essential to all professional http://www.vb6.us/tutorials/error-handling-visual-basic applications. Any number of run-time errors can occur, and if your program does not trap them, the VB default action is to report the error and then terminate the program (often resulting in the end user calling you and complaining, "Your program kicked me out!"). By placing error-handling code in your program, you can trap a run-time error, report it, on error and let the user continue. Sometimes the user will be able to correct the error and sometimes not, but simply allowing the program to crash is not acceptable. You should generally place error-handling code in any Sub or Function that accesses files or databases. Your code will typically interrogate the Number and Description properties of the built-in VB Err object in on error goto an error-handling routine set up with the On Error statement. In this section, we will look at the following statements: On Error GoTo label On Error Resume Next Following is a brief tutorial in error-handling. To perform this tutorial, you should have a floppy disk handy. Also, in the VB IDE, make sure that the Break on Unhandled Errors option is set under Tools à Options à General. STEPS: 1. Start a new project. 2. Place four command buttons on the form. Name them and set their Captions as follows: Name Caption cmdCrash Crash cmdGoToLabel GoTo Label cmdGoTo0 GoTo 0 cmdResumeNext Resume Next Your form should look something like this: 3. Code the cmdCrash_Click event as follows: Private Sub cmdCrash_Click() Open "A:\JUNK.TXT" For Input As #1 MsgBox "File was opened successfully" Close #1 End Sub 4. Place your floppy disk in the A: drive. Run the program and click the Crash button. Assuming that you do not have a file called "JUNK.TXT" on your A: disk, the program will
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