Outlook
A family of Microsoft email and calendar products.
2,990 questions
Error 429 only if Outlook is already open when try to automate an email
Hugh Self Taught
81
Reputation points
Good day Gurus of .Net
Since I started trying to get my app to be option strict compliant, I've suddenly started getting error 429 Unable to create active x component BUT only when Outlook is already open. I have the following code to get an instance of Outlook. The line "oOutlook = Activator.CreateInstance(outlookType)" returns the following error. Any ideas on how I rectify this will be greatly appreciated
Dim procs() As Process = Process.GetProcessesByName("Outlook")
If procs.Count > 0 Then
Dim outlookType As Type = Type.GetTypeFromProgID("Outlook.Application")
oOutlook = Activator.CreateInstance(outlookType)
Else
'oOutlook = New Outlook.Application()
oOutlook = New Microsoft.Office.Interop.Outlook.Application()
End If
oNameSpace = oOutlook.Session
Dim oFolder As Outlook.MAPIFolder = oNameSpace.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox)
Outlook
VB
VB
An object-oriented programming language developed by Microsoft that is implemented on the .NET Framework. Previously known as Visual Basic .NET.
2,575 questions
Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
3,500 questions
{count} votes
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Viorel 112.4K Reputation points2024-04-19T05:36:39.3933333+00:00 Did you try to use the Else block only?
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Hugh Self Taught 81 Reputation points
2024-04-19T08:37:26.6933333+00:00 Morning @Viorel I've just tried it and get the same error as I posted with Outlook open. I've just tested with a copy of the project I saved prior to starting to change all late binding so I could have option strict on & it works fine there. The only email module differences are the imports and getting/creating an instance of outlook. The original has these imports:
Imports System.Net
Imports System.Net.Mail
Imports System.Text.RegularExpressions
The updated version has these:
Imports System.IO
Imports System.Net
Imports System.Net.Mail
Imports System.Text
Imports System.Text.RegularExpressions
Imports Microsoft.Office.Interop
Imports Microsoft.Office.Interop.Outlook
Imports Redemption
The original only has these lines "Dim oOutlook as Object" and
"oOutlook = CreateObject("Outlook.Application")" and it creates a mailitem whether Outlook is open or not but then I can't turn option strict on
Any ideas?
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