Hi!

Remember, you're using external DLL that does something with linking events between objects, that may be a cause of problems in firing of Error event. VFP6.0 was not designed to support such feature completely.

>Thanks Vlad!
>
>You are right, it works fine when I use 'ON ERROR'.
>
>Although I think it is a bit strange. In a good object model I would expect the Error event to always be fired when an error occurs. Especially when you work in an n-tier solution where you want to distribute the error to the UI.
>
>/Peter
>
>>Hi!
>>
>>Looks like Error event should be defined somewhere in the VFPCOM.DLL ;)
>>
>>Try to use 'ON ERROR' command to define error handler.
>>
>>>I have a problem with the ADO event WillChangeField and errortrapping in VFP6.
>>>I have created a class in VFP6 in which I have implemented the RecordSet events with the method BindEvents in VFPCOM.DLL.
>>>
>>>When the WillChangeField event fires I cancel the field change by setting the parameter adStatus to 4 (adStatusCancel). When I do this Foxpro generates an error dialog with the error; OLE IDispatch exception code 0 from provider: Operation was canceled... This is ok because I assume the error comes from the recordset because I canceled the field change. To trap the error I add the Error event to my class, but I can't get it to fire.
>>>
>>>What am I doing wrong? How can I intercept the error so it doesn't show on the screen?
>>>
>>>Code sample:
>>>loVfpCom = CREATEOBJECT("vfpcom.comutil")
>>>
>>>loConnection = CREATEOBJECT("ADODB.Connection.2.5")
>>>loConnection.ConnectionString = "Provider=SQLOLEDB;Data Source=server;Initial Catalog=data;User ID=sa"
>>>loConnection.Open()
>>>
>>>loRecordSet = CREATEOBJECT("ADODB.Recordset")
>>>loRecordSet.ActiveConnection = loConnection
>>>loRecordSet.CursorType = 1 && adOpenKeySet
>>>loRecordSet.CursorLocation = 3 && adUseClient
>>>loRecordSet.LockType = 4 && adLockBatchOptimistic
>>>loRecordSet.Source = "SELECT * FROM table"
>>>loRecordSet.Open()
>>>
>>>loObject = CREATEOBJECT("MyRecordSet")
>>>loVfpCom.BindEvents(loRecordSet, loObject)
>>>
>>>loRecordSet.MoveFirst()
>>>loRecordSet.Fields(1).Value = "Test"
>>>
>>>DEFINE CLASS MyRecordSet AS Custom
>>>
>>> PROCEDURE WillChangeField(cFields, Fields, adStatus, pRecordset)
>>> adStatus = 4 && adStatusCancel
>>> ENDPROC
>>>
>>> PROCEDURE Error(tnError, tcMethod, tnLine)
>>> ACTIVATE SCREEN
>>> ?tnError, MESSAGE(), tcMethod, tnLine
>>> ENDPROC
>>>ENDDEFINE
>>>
>>>TIA
>>>/Peter