On Error Goto 0 In Vb6
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On Error Goto 0 Vbscript
Overflow the company Business Learn more about hiring developers or posting ads with us Stack on error goto line Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community on error exit sub of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why would you ever use “On Error Goto 0”? up vote 19 down vote favorite 5 Why
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would you ever use "On Error Goto 0" in a VB6 app? This statement turns the error handler off and would mean that any error would crash the app. Why would this ever be desirable? vb6 error-handling share|improve this question asked Apr 2 '12 at 20:37 CJ7 4,99232114220 4 Well, it's certainly a way of implementing fail-fast –Greg Hewgill Apr 2 '12 at 20:39 I don't have VB6
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installed, but presumably any Goto statement to a non-existant label would crash the app. –Sam Axe Apr 2 '12 at 20:40 This sounds like a comment from somebody who either throws in On Error Resume Next at the head of each procedure and then has mysterious woes that can't be diagnosed, or one who puts in On Error GoTo MyHandler and there just pops up a MsgBox with the same error anyway. –Bob77 Apr 2 '12 at 21:14 2 Not true at all. It is commonly paired with On Error Resume Next and a test of Err.Number to do inline structured error handling. –Bob77 Apr 3 '12 at 0:52 1 @CraigJ: Remember that the error handling is for that procedure (and children) only. "Turning it off" is NOT global, and allows errors to be handled by the parent. –Deanna Apr 3 '12 at 15:28 | show 9 more comments 4 Answers 4 active oldest votes up vote 35 down vote In VB6, you can specify that you want errors to be handled by particular code later in the routine: Sub Bar() On Error Goto MyHandler ... ...some code that throws an error... ... Exit Sub MyHandler: ...some error handler code (maybe pops up a dialog) End Sub It
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posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow try catch vba 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: does “On Error Goto 0” affect the error http://stackoverflow.com/questions/9983464/why-would-you-ever-use-on-error-goto-0 handler for the calling function? up vote 2 down vote favorite If On Error Goto 0 is called in a VB6 Sub, will this switch off error handling even when control goes back to the calling Function/Sub? EDIT: If I have output in an error-handler block that is showing an error number of 0, what does that indicate? vb6 error-handling share|improve this question edited Jun 22 '10 http://stackoverflow.com/questions/3090510/vb6-does-on-error-goto-0-affect-the-error-handler-for-the-calling-function at 13:29 asked Jun 22 '10 at 5:31 CJ7 4,99232114220 add a comment| 3 Answers 3 active oldest votes up vote 3 down vote accepted No. The VB6 manual makes it clear that On Error Goto 0 only affects the current procedure: On Error Goto 0 disables any enabled error handler in the current procedure. EDIT There's now an addition to the question, which wasn't there when I posted this answer. The question is "If I have output in an error-handler block that is showing an error number of 0, what does that indicate?". For the answer, see Mike's answer. share|improve this answer edited Jun 22 '10 at 17:42 answered Jun 22 '10 at 9:12 MarkJ 24.9k34878 add a comment| up vote 2 down vote No. http://www.vb-helper.com/tut6.htm When a program encounters an error, Visual Basic checks to see if an error handler is presently installed in the current routine. If so, control passes to that error handler. If no error handler is in effect, Visual Basic moves up the call stack to the calling routine to see if an error handler is currently installed there. If so, the system resumes execution at that error handler. If no error handler is instal
your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the http://www.vbforums.com/showthread.php?526214-On-Error-GoTo-0 register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 12 of 12 Thread: On Error GoTo 0 Tweet Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Jun 8th, 2008,04:11 AM #1 jonrmoore View Profile View Forum Posts Thread Starter on error Hyperactive Member Join Date Jan 2008 Posts 325 On Error GoTo 0 I have several vb6 projects that I inherited from a programmer who is no longer available. I frequently see this statement; however, I don't know what it does. Other times I see "On Error GoTo ErrLine" which I can follow. Can someone tell me where is the "0" or where does the statement on error goto take me? Thanks. Reply With Quote Jun 8th, 2008,04:24 AM #2 Doogle View Profile View Forum Posts PowerPoster Join Date Jul 2006 Location Maldon, Essex. UK Posts 6,334 Re: On Error GoTo 0 'On Error GoTo 0' turns off error trapping. ie if a statement fails following that the error routine is not called and your program will abort. Reply With Quote Jun 8th, 2008,04:33 AM #3 jonrmoore View Profile View Forum Posts Thread Starter Hyperactive Member Join Date Jan 2008 Posts 325 Re: On Error GoTo 0 Thanks. That is the exact opposite of what I need to do. If an "INSERT" statement fails, I would like to display a message box showing certain field values to help the user figure out what parameter table entry is wrong. Here is a sample statement that I think is the usual culprit: HTML Code: dbAR.Execute "INSERT INTO Distribution(" & dFlds & ") VALUES(" & _ arRS!ID & ",'" & rs!ref & "'," & pRs!memberID & ",'" & _ d & "',#" & d & "#,0,'Payment-'" & pRs!pmtDesc & "',6," & _ rs!amt & ",0," & rcd & ",'" & dpt & "'," & comp &