Autodesk Inventor is natively built using C++ and exposes its features to the outside world via COM interfaces. Modern Windows development, however, heavily relies on .NET languages like C# and VB.NET. Because .NET cannot communicate with COM directly, it requires an intermediary layer.
is the essential gateway. This Dynamic Link Library (DLL) serves as the primary bridge between the Inventor application and external programming environments like C# or VB.NET. What is an Interop Assembly?
Her chest tightened. That DLL name was familiar — it connected the Inventor application to outside code, the bridge plugins and scripts used to automate repetitive tasks. Without it, several in-house tools and the macro that populated custom properties would remain stubbornly silent.
Developers writing automated regression tests for Inventor features use this DLL to programmatically open files, perform operations, and validate results.
Add the following to your app.config file: autodesk.inventor.interop.dll
catch (COMException)
To understand the purpose of Autodesk.Inventor.Interop.dll , it helps to understand how the Inventor API is built.
Ensure both Visual Studio (or your compiled app) and Autodesk Inventor are running under the same user context. If you run Visual Studio "As Administrator," Inventor must also be run "As Administrator." 2. "Type Mismatch" or Version Conflicts
Open, create, modify, and save parts ( .ipt ), assemblies ( .iam ), and drawings ( .idw / .dwg ). Autodesk Inventor is natively built using C++ and
The file is automatically installed with Autodesk Inventor and can typically be found in the following directory:
You do not need to download this file from third-party websites. In fact, downloading it from untrusted internet sources poses a significant security risk.
: In modern Visual Studio versions, it is recommended to set the "Embed Interop Types" property to True for this reference. This embeds only the specific metadata your project needs into your final executable, removing the need to distribute the actual DLL alongside your application.
You can create, open, and modify parts ( .ipt ), assemblies ( .iam ), and drawings ( .idw / .dwg ). is the essential gateway
In your code, you will import the namespace to access the API objects: using Inventor; Use code with caution. 3. Core Concepts: Working with the Inventor API Once referenced, you can begin interacting with Inventor. A. Connecting to Inventor
Usually found under: C:\Program Files\Autodesk\Inventor \Bin\Public Assemblies\Autodesk.Inventor.Interop.dll
When you reference this DLL in your coding project, you gain complete access to the Inventor object model. This includes parts, assemblies, drawings, parameters, iProperties, and material libraries. Key Capabilities Unlocked by the DLL