Inventor Vb.Net "AddIn" - Show "oDoc.Displayname" Using A Button Click

[isocam]

Can anybody help?

I have created a Vb.Net "AddIn" that automatically creates a button that calls a simple sub-routine.

I want to change the sub-routine, for testing purposes, so that it shows the oDoc.Displayname.

The following is the code I currently have but it is not working.

Imports Inventor

Module Module12
Sub ControlPanel()

Dim invApp As Inventor.Application = Nothing

invApp = GetObject(, "Inventor.Application")

oDoc = oInvApp.ActiveDocument

Msgbox(oDoc.Displayname)
End Sub

End Module

Does anybody know what is wrong and rectify the error for me?

Many thanks in advance!

Darren

[cidhelp]

oDoc = invApp.ActiveDocument

[isocam]

Hi,

Unfortunately, this does not work.

Can you please help?

Kind Regards

Darren

[jjstr8]

It would help to have a little more information: e.g. version, what's not working, etc. @cidhelp pointed out the typo, but it's not clear what's going wrong. Also, an addin doesn't need to get the Inventor application object. It's passed into your ApplicationAddInServer implementation. Is this a standalone application?

[isocam]

Hi,

Many thanks for the reply!

I have created an "AddIn" for Autodesk Inventor 2025.

The sub-routine is called by pressing a custom button.

At present, I have just created a message box stating "Hello World". and this is correctly displayed when I press the button.

All I need, for testing purposes, is to display the filename of the active document when I press the button.

For some reason, the message box is not showing

Can you please help?

Many thanks in advance!

Darren

[jjstr8]

I still get the feeling that you have a stand-alone application (exe), not an addin (dll). See this link for a description.

https://help.autodesk.com/view/INVNTOR/2025/ENU/?guid=GUID-4939ABD1-A15E-473E-9376-D8208EC029EB 

If you do indeed have a stand-alone application, check the solution in this post for retrieving the Inventor application object in .NET Core. Your application needs to be .NET 8, not a .NET Framework application.

https://forums.autodesk.com/t5/inventor-programming-ilogic/debugging-in-the-newer-version-of-net-in-... 

[isocam]

Hi,

I have created an "AddIn" dll file, not a stand alone exe.

Kind Regards

Darren

[jjstr8]

Please check the following link.

https://help.autodesk.com/view/INVNTOR/2025/ENU/?guid=GUID-52422162-1784-4E8F-B495-CDB7BE9987AB

Inventor will pass an ApplicationAddInSite object into your addin when it calls the Activate method in your implementation. From there you can get the Application object. You do not need to use GetObject or Marshal.GetActiveObject to get the Inventor application object.

[JelteDeJong]

You might want to have a look at my tutorial about creating addins.

http://hjalte.nl/tutorials/80-creating-an-addin-inventor-2025-and-later 

There you will find a explanation on how to create buttons how to get the inventor object. (Getting the Inventor object using the marshal like you did is possible but make your addin run slow. You can better use the object provided by Inventor when you addin is started.)

[marcin_otręba]

Maybe try to declare oDoc first like:

Dim oDoc As Document = oinvApp.ActiveDocument

also as mentioned use 

invApp= addInSiteObject.Application