Automation Error Callbyname
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to load a Form by Name causes a run-time Automation Error (440) in a compiled EXE in the following scenario: Private Sub MDIForm_Load() Dim NewForm As Form Set NewForm = LoadAForm("frmDocument") End Sub Private Function LoadAForm(FormName As String) As Form Set LoadAForm = CallByName(Forms, "Add", VbMethod, FormName) End Function NOTE: Using this technique works fine in the VB6 IDE, but generates the error ONLY in the compiled EXE. -- Robert R. Thele [Remove NoSpam_ to reply via E-mail] Sat, 24 Mar 2001 03:00:00 GMT http://stackoverflow.com/questions/27429431/handling-of-automation-errors-in-vb #2 / 3 VB6 - CallByName causes Automation Error in EXE Fri, 19 Jun 1992 00:00:00 GMT RDMmgm#3 / 3 VB6 - CallByName causes Automation Error in EXE Just got word from MS..... It is not a fault in the CallByName function, but a fault in the Add method of the Forms collection (Forms.Add). This problem has been escalated to the VB 6 Dev team........without http://computer-programming-forum.com/63-visual-basic/34bbfd7e23a88e91.htm NO word as to a "Fix Date". Hope that helps someone else stay clear of this technique.....'cuz it's too late for me :-( -- Robert R. Thele [Remove NoSpam_ to reply via E-mail] Quote: >Using CallByName function to load a Form by Name causes a run-time Automation >Error (440) in a compiled EXE in the following scenario: >Private Sub MDIForm_Load() > Dim NewForm As Form > Set NewForm = LoadAForm("frmDocument") >End Sub >Private Function LoadAForm(FormName As String) As Form > Set LoadAForm = CallByName(Forms, "Add", VbMethod, FormName) >End Function >NOTE: Using this technique works fine in the VB6 IDE, but generates the error >ONLY in the compiled EXE. >-- >Robert R. Thele >[Remove NoSpam_ to reply via E-mail] Sat, 24 Mar 2001 03:00:00 GMT Page 1 of 1 [ 3 post ] Relevant Pages 1. Can't open VB6 because VB6 caused a stack fault in module VB6.EXE 2. Can't open VB6 because VB6 caused a stack fault in module VB6.EXE 3. ERROR$ causes errors during OLE Automation 4. Err.Raise Causes Automation Error 5. signing vba macros in word causes automation errors and crashes 6. Word 8.0 OLB SpellCheck - GetSpellin
that it should be possible to integrate into even the most hairy of legacy applications. I tried reading up on existing tools, but there where not many, and the documentation left much to be desired. But the http://zbz5.net/adventures-vb6-reflection-and-error-handling one thing I found was that they all required ActiveX dll's or exe files. If http://www.xtremevbtalk.com/-net-office-automation/296563-catch-excel-runtime-error-winform.html your legacy application is not designed using this technology, for example if it's just a standard vb6 executable, your pretty much left out in the dark. So there is my goal, a Visual Basic 6 testing framework that can be inserted into legacy applications. The blindness In order to avoid boilerplate code modern testing framework uses reflection to infer a automation error lot of information about the testfixtures and testmethods. It turns out that the old world of vb6 is rather lacking in the reflection department. The recommended way is to use the type information library, but once again I hit the ActiveX wall. The type information library only deals with dynamic libraries, which a standard VB6 executable is not. I was left with only two reflection like methods: The TypeName function, that gets the name of the automation error callbyname type for a given object. The CallByName function, that can invoke a member on a given object by name given as a string There seems to be no way to extract the names of public members from a class module. My solution was to require each test class to provide a public function that returns a collection of all test methods that should be invoked. (Boilerplate, and copy / paste this means.) With this information I can use CallByName to invoke the test methods. But this should not be my biggest challenge: Err, Err.Raise and automation errors Modern testrunners rely on catching exceptions to get information about what went wrong if a test fails. This could be an exception thrown by the code under test, or an exception thrown by the asserter indicating that a value was not as expected. Trusty old VB6 does not have a notion of exceptions (nor stack trace for that matter). It does however have a global Err object. If something goes wrong the information in the Err object changes, the code path is interrupted, and guided by "On error Goto" statements you can attempt to handle the Err as best you can. The combination of having some code in an ActiveX dll (as my testing framework will be), and some code in a standard VB6 exe project have some reall
Express editions) > .NET Office Automation > How to Catch An Excel Runtime Error From a WinForm? Thread Tools Display Modes #1 05-15-2008, 11:16 AM slimasian Newcomer Join Date: May 2008 Posts: 3 How to Catch An Excel Runtime Error From a WinForm? Hi all, New to the board here, and I was hoping someone had some insight to a little issue I have... Basically, I am writing a WinForm app on Visual Studio .Net 2005 which will be a rudimentary "unit tester" for various MS Excel 2003 applications...basically, it will ensure the integrity of the VBA code which fires off in the event lifecycle of the workbook. As a test for a "unit test failure," I created a simple workbook which generates a runtime error at the Workbook_Open event in the VBA code (an intentionally placed out-of-index call to an array). I have no problem opening workbooks via the .Net WinForm using the Excel Object library. My problem is that the run-time error is not captured by the WinForm app -- instead, it throws the runtime error directly on the Excel thread which the WinForm app starts. Is there a way for the WinForm app leveraging office interop to catch that excel runtime exception? I've tried encasing the call in a Try-Catch block using a general Exception a COMException (via the System.Runtime.InteropServices library) catch...I've also tried instantiating the workbook directly using CreateObject(sPath) and instantiating an Excel Application, then using that to open the workbook...all with the same results...instead of the .Net app catching the exception, the runtime error bubbles up directly to the Excel application. Is there any way, either on .Net or the VBA code, for the WinForm app to catch and handle an Excel run-time error? Thanks for your help! slim... slimasian View Public Profile Find all posts by slimasian #2 05-16-2008, 07:02 AM Mike Rosenblum Microsoft Excel MVP Forum Leader* Guru * Join Date: Jul 2003 Location: New York, NY, USA Posts: 7,848 Hi slimasian, Welcome to the forum. This is a tough one, and I'm not sure t