OBJ files are commonly used in 3D modeling and are supported by many software programs. However, you can also use OBJ files to build executable files for your programming projects. Here's how to do it:

1. Choose a Programming Language: First, choose a programming language that supports working with OBJ files. Some common options include C++, Python, and Java.

2. Utilize a Library: Many programming languages have libraries or modules that allow you to work with OBJ files. For example, in C++, you can use the OpenGL library to handle 3D graphics and OBJ files.

3. Read the OBJ File: Use the appropriate functions in your chosen programming language to read the data from the OBJ file. This may involve parsing the file to extract information about the 3D model, such as vertices, faces, and textures.

4. Process the Data: Once you have read the data from the OBJ file, you can process it according to your project's requirements. For example, you might manipulate the 3D model, apply transformations, or generate additional data.

5. Create the Executable: Use the processed data to create the executable file. This could involve rendering the 3D model, implementing a user interface, or performing any other actions necessary for your program.

6. Compile and Build: Finally, compile your code and build the executable file. This will generate the final program that incorporates the OBJ file data.

By following these steps, you can use OBJ files to build executable files for a wide range of programming projects. Whether you're creating a 3D visualization tool, a virtual reality experience, or a simulation application, leveraging OBJ files can add depth and complexity to your programs.