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Combine Bodies Example (C#)

This example shows how to combine bodies in a multibody part.

// Preconditions:
// 1. Verify that the part document to open exists.
// 2. Open the Immediate window.
// Postconditions:
// 1. Opens the specified part document.
// 2. Selects two solid bodies.
// 3. Inserts a combine feature using the two selected
//    bodies.
// 4. Prints the type of combine feature to the Immediate
//    window.
// 5. Examine the Immediate window.
// NOTE: Because the part document is used elsewhere, do not
// save changes.
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
using System;
using System.Diagnostics;
namespace CombineBodiesCSharp.csproj
    public partial class SolidWorksMacro
        public void Main()
            ModelDoc2 swModel = default(ModelDoc2);
            ModelDocExtension swModelDocExt = default(ModelDocExtension);
            FeatureManager swFeatureMgr = default(FeatureManager);
            Feature swFeature = default(Feature);
            CombineBodiesFeatureData swCombineBodiesFeatureData = default(CombineBodiesFeatureData);
            string fileName = null;
            bool status = false;
            int errors = 0;
            int warnings = 0;
            fileName = "C:\\Users\\Public\\Documents\\SOLIDWORKS\\SOLIDWORKS 2018\\samples\\tutorial\\multibody\\multi_inter.sldprt";
            swModel = (ModelDoc2)swApp.OpenDoc6(fileName, (int)swDocumentTypes_e.swDocPART, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, ""ref errors, ref warnings);
            swModelDocExt = (ModelDocExtension)swModel.Extension;
            status = swModelDocExt.SelectByID2("Extrude-Thin1""SOLIDBODY", 0, 0, 0, true, 0, null, 0);
            status = swModelDocExt.SelectByID2("Boss-Extrude1""SOLIDBODY", 0, 0, 0, true, 0, null, 0);
            status = swModelDocExt.SelectByID2("Extrude-Thin1""SOLIDBODY", 0, 0, 0, false, 2, null, 0);
            status = swModelDocExt.SelectByID2("Boss-Extrude1""SOLIDBODY", 0, 0, 0, true, 2, null, 0);
            swFeatureMgr = (FeatureManager)swModel.FeatureManager;
            swFeature = (Feature)swFeatureMgr.InsertCombineFeature((int)swBodyOperationType_e.SWBODYADD, nullnull);
            swCombineBodiesFeatureData = (CombineBodiesFeatureData)swFeature.GetDefinition();
            status = swCombineBodiesFeatureData.AccessSelections(swModel, null);
            // swCombineBodiesOperationAdd = 0
            // swCombineBodiesOperationCommon = 2
            // swCombineBodiesOperationSubract = 1
            Debug.Print("Type of combine feature: " + swCombineBodiesFeatureData.OperationType);
        /// <summary>
        ///  The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
        public SldWorks swApp;

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