Visio Guy

Hi All,

Long time lurker, first time poster.

I have over the past few years been playing around with a VSTO add-in which has been working well. I recently re-built my machine and reinstalled Visual Studio which and when I opened my solution I am getting a few errors which I think I have worked out is due to a .Net upgrade from version 4 to version 4.6.1. I am not a developer and have seemed to have fumbled my way around well enough but this one has me stumped and was wondering if anyone has experienced this.
A sample of the errors I get are:

Error   BC30590   Event 'Startup' cannot be found.
Error   BC30456   'ActiveWindow' is not a member of 'Application'.

I would love any insights that can save me from having to create a new solution and migrate all the code. Oh I should have mentioned, if I create a new VSTO solution I don't get the same errors...

Cheers
JnK

Could you post the lines of code that generates these errors?

Certainly. The following code snippets cause the error. This was working perfectly before Visual Studio upgraded the solution to .Net Framework 4.6.1. The following code also works perfectly on a new solution that I create from scratch on .Net framework 4.6.1. It seems that something "breaks" when Visual Studio upgrades the solution.

I have tested this on multiple machines and multiple versions of identical code. The only difference is that as soon as VS upgrades the framework, these errors appear.

Code snippet 1

    Private Sub ThisAddIn_Startup() Handles Me.Startup
        _panelManager = New PanelManager(Me)

        visioApplication = GetObject(, "Visio.Application")

    End Sub

Code snippet 2

    Public Sub TogglePanel()
        _panelManager.TogglePanel(Application.ActiveWindow)
    End Sub