The best way to solve is Writing a generic error handling routine in vb6

August 03, 2020 by Anthony Middleton

 

Here are some simple steps that can help you solve the problem of writing a generic error handler in vb6. Error handling is an important procedure in Visual Basic programming because it can help make a program error-free. The error-free program can run smoothly and efficiently, and the user does not have to face all possible problems such as program crashing or system downtime.

 

 



Let's see what's going on here. Initially, this procedure is performed only if there was an error. The message box appears above the visual Description of the major error [Error (Err.Number)] used as a message critical icon with Cancel, Redo, and Skip buttons and uses Error number [Err.Number] as header. This message box returns a response that indicates Which button was selected by the user?


write a generic error handling routine in vb6

If Cancel is selected, we simply end the process. (It This is done with a summary on a line called ExitLine. Remember all the trap mistakes should be supplemented with some kind of resume instruction.)



If "Retry" is selected, the wrong program line is repeated (In a real application, you or the user need to change something here correct the fault condition).


How do you handle errors in VBScript?

By default, when an error occurs, VBScript stops execution of the script, and RhinoScript reports the error to the user. Sometimes this standard error handling is not desirable. In this case, you can use the Err object and the On Error statement so that scripts can do their own error handling.


Sub SubExample ()
,
, [Declare Variables, ...]
,
If there are errors GoTo HandleErrors
,
, [Procedure Code]
,
Leaving the submarine
HandleErrors:
Select Case MsgBox (Error (Err.Number), vbCritical + vbAbortRetryIgnore, "Error Number "+ Str (Err.Number))
Fall vbAbort
Continue ExitLine
VbRetryCase
Continue
VbIgnore case
Next Next

End Select
ExitLine:
Leaving the submarine
End Sub



This is also a very simple error handling routine. You must define it Utility in your applications and make the necessary changes. Specially, You need some code to clear the error conditions before using the Retry option.

• One last thing. Once you've written your error handler, you need to test it to make sure it is working correctly. However, runtime errors sometimes occur difficult and possibly dangerous. visually The main thing comes to the rescue! Visual Method (hoisting) is assigned to Basic Err object which simulates this A runtime error occurred. Use:
to throw an error with a Number value
Err.Raise Number

• With this function, we can fully check the operation of the error We write to managers. Remember to remove the lift expression after the test however finished! And to really get out of hand, you can use Raise to generate Your own "defineApplication-Bugs. There are specific bugs for Your application that you want to intercept.

• Clear the error state (any error, not just one that Zoom method), use the delete method:


How do you handle run time error?

  1. try: A try block defines a block of code for which certain exceptions are enabled.
  2. catch: the program catches the exception using an exception handler at the point in the program where you want to solve the problem.
  3. Finally block: The finally block is always executed immediately after the end of the try-catch block.


 

 

 

 

 

 

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