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Create a Callout Independent of a Selection (C#)

This example shows how to create a callout that is independent of a selection.

// Preconditions:  
// 1. Document is open in SolidWorks.
// 2. Right-click the project in Project Explorer, select Add Reference,

//    browse to <SolidWorks_install_dir>\api\redist,

//    and select SolidWorks.interop.swpublished.dll.
// 3. Rename the namespace of this macro to match the name of your C# project.
// Postconditions:
// 1. A callout is created with two leaders.
// 2. The callout label does not display a colon.
// 3. The callout value is empty.
using System;
using System.Collections.Generic;
using System.Text;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using SolidWorks.Interop.swpublished;
using System.Diagnostics;
namespace CreateCallout_CSharp.csproj
partial class SolidWorksMacro
ModelDoc2 swModel;
ModelDocExtension swExt;
SelectionMgr swSelMgr;
MathUtility mathUtil;
public void Main()
            swModel = (
            swExt = swModel.Extension;
            swSelMgr = (
            mathUtil = (
calloutHandler handle = new calloutHandler();
MathPoint mp;
double[] vPnt = new double[3];
            vPnt[0] = 0.0;
            vPnt[1] = 0.0;
            vPnt[2] = 0.0;
            mp = (
Callout myCallout;
            myCallout = swExt.CreateCallout(2, handle);
"SldWorks API");
            myCallout.SkipColon =
true, true);
            myCallout.SetTargetPoint(1, 0.001, 0.001, 0);
            myCallout.SetTargetPoint(2, -0.001, 0.001, 0);
            myCallout.Position = mp;
            myCallout.TextBox =

public SldWorks swApp;
public class calloutHandler : SwCalloutHandler
        #region ISwCalloutHandler Members
bool ISwCalloutHandler.OnStringValueChanged(object pManipulator, int RowID, string Text)
Debug.Print("Text: " + Text);
Debug.Print("Row: " + RowID.ToString());
return true;


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