Define Custom Errors

"Sruli" <sruli1@hotmail.com> wrote:
>
>Is there a way to define a description text for a custom error code?
>E.g., My COM object may return a custom error code vbObjectError + 1000.
>
>If the VB application calls Err.description, I want to it return the custom
>text, like "Your files are gone", ant not the generic message "Application
>error". Can I do it?
>
>Thanks in advance
>Sruli

You can specify a description, source information (where the error
occurred), and even a pointer to a help file entry when you raise the error:

object.Raise number, source, description, helpfile, helpcontext

--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele

"Sruli" <sruli1@hotmail.com> wrote in message news:3d3161f0$1@10.1.10.29...
>
> Is there a way to define a description text for a custom error code?
> E.g., My COM object may return a custom error code vbObjectError + 1000.
>
> If the VB application calls Err.description, I want to it return the
custom
> text, like "Your files are gone", ant not the generic message "Application
> error". Can I do it?
>
> Thanks in advance
> Sruli

> This is OK if I raise the error from VB.
> However, my VB calls a COM object, which returns a custom error code like
> 80040777 (vbObjectError + 777). Err.Description just returns the generic
> text "Automation error". How can I make it return a custom text, like "All
> your files are gone"?

Sruli,

Both of your posts make it unclear whether the COM object is being developed
by you, or is provided by a third party. That appears to be why you have
received (what appear to be to you) unsatisfactory answers. Would you like
to clarify?

--
Rob

Wildly Out of Date Excel VBA Programming Stuff:
www.analytical-dynamics.co.uk/

On 15 Jul 2002 01:59:09 -0700, "Sruli" <ganor@softlink.com> wrote:

Rob,

You are right. Sorry for the confusion. The COM object is being developed
by me. It may return both standard errors (e.g., E_FAIL) and custom errors
(HRESULTS) and I want the caller VB application to get the real error description
when it calls Err.Description.

Maybe you could post your code because the Err.Description value should be what you specify in the
Description argument of the Raise method (as Doug mentioned).

Paul ~~~ pclement@ameritech.net
Microsoft MVP (Visual Basic)

On 15 Jul 2002 23:37:06 -0700, "Sruli" <ganor@softlink.com> wrote:

Paul Clement <UseAdddressAtEndofMessage@swspectrum.com> wrote:
>Maybe you could post your code because the Err.Description value should
be what you
>specify in the
>Description argument of the Raise method (as Doug mentioned).
>
>
>Paul ~~~ pclement@ameritech.net
>Microsoft MVP (Visual Basic)

Paul,

I'm afraid that I'm still not clear. I don't use Raise at all. My VB application
calls a COM object which we developed in C++ (not VB). The COM object returns
standard error codes Hresuts (such as E_FAIL) or custom errors. For example,
the COM object may do this:

HRESULT hr = MAKE_HRESULT(1, FACILITY_ITF, 0x777)
return hr; // return custom error 0x80040777

The caller VB detects an error and calls Err.Description, but Err.Description
returns "Automation error" for any custom error. Is there a way I can make
it return the real meaning of each custom error?

I'm not a C++ programmer but one of the following may be what you are looking for:

http://msdn.microsoft.com/msdnmag/issues/1000/COM_C/COM_C.asp
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q189134
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnduwam/html/d2dalatl.asp

Paul ~~~ pclement@ameritech.net
Microsoft MVP (Visual Basic)