What Is AutoCAD Net?

What Is AutoCAD Net?

AutoCAD Net is a powerful programming interface that allows developers to extend the functionalities of AutoCAD software. With AutoCAD Net, you can create custom tools and applications to automate tasks, enhance productivity, and streamline your workflow in AutoCAD.

Why Use AutoCAD Net?

1. Customization:
AutoCAD Net provides a wide range of customization options that allow you to tailor the software according to your specific needs.

You can create custom commands, menus, and dialog boxes to make the user interface more intuitive and efficient.

2. Automation:
By leveraging the power of AutoCAD Net, you can automate repetitive tasks and reduce manual effort.

You can write scripts or programs that perform complex operations with just a few clicks, saving valuable time and improving accuracy.

3. Integration:
AutoCAD Net seamlessly integrates with other programming languages like C#, VB.NET, and C++.

This integration enables you to leverage existing libraries and frameworks to extend the functionality of AutoCAD further.

Getting Started with AutoCAD Net

To start using AutoCAD Net, you need a basic understanding of programming concepts and familiarity with the .NET framework. Here are the steps to get started:

  1. Install AutoCAD: Make sure you have Autodesk AutoCAD installed on your computer.
  2. Create a New Project: Open your preferred Integrated Development Environment (IDE) such as Visual Studio.
  3. Select a Template: Choose the appropriate template for creating an AutoCAD Net project.
  4. Write Your Code: Start writing your code using C# or VB.NET syntax within the IDE’s editor.
  5. Build and Run: Build your project to compile the code and run it within AutoCAD.

An Example of AutoCAD Net Code:

Here’s a simple example that demonstrates how to create a line using AutoCAD Net:

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.DatabaseServices;
using Autodesk.Geometry;
using Autodesk.Runtime;

public class MyCommands
    public void CreateLine()
        // Get the current document and database
        Document doc = Application.DocumentManager.MdiActiveDocument;
        Database db = doc.Database;

        // Start a new transaction
        using (Transaction tr = db.TransactionManager.StartTransaction())
            // Open the ModelSpace for write
            BlockTableRecord modelSpace = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;

            // Create a new line entity and specify its start and end points
            Line line = new Line(new Point3d(0, 0, 0), new Point3d(10, 10, 0));

            // Append the line entity to the ModelSpace

            // Commit the changes to the database and dispose of the transaction
            tr.AddNewlyCreatedDBObject(line, true);

By compiling and running the above code within AutoCAD, you will be able to create a line from (0, 0) to (10, 10) in the current drawing. This is just a basic example, and AutoCAD Net offers myriad possibilities for creating complex objects and performing advanced operations.

To run custom commands created using AutoCAD Net, you can either enter the command name in the AutoCAD command line or assign it to a button or menu item for easy access.


AutoCAD Net is a valuable tool for developers who want to extend the functionality of AutoCAD and create custom tools and applications. With its rich set of features and seamless integration with other programming languages, AutoCAD Net opens up endless possibilities for automation and customization in AutoCAD.