Learn Solidworks-api - 10 Code Examples & CST Typing Practice Test

SolidWorks API is a COM-based programming interface that allows developers to automate, customize, and extend the SolidWorks CAD software, enabling tasks from simple macros to complex design automation and integration with external systems.

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Create a New Part Document Add a Sketch on Front Plane Draw a Line in Sketch Draw a Circle in Sketch Extrude a Sketch Create a Rectangle Sketch Apply Fillet to Edge Add Material to Part Create a Circular Pattern Save Part Document

Learn SOLIDWORKS-API with Real Code Examples

Updated Nov 27, 2025

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Code Sample Descriptions

Create a New Part Document

Dim swApp As SldWorks.SldWorks
Dim swPart As ModelDoc2
Set swApp = Application.SldWorks
Set swPart = swApp.NewDocument("C:\ProgramData\SolidWorks\SOLIDWORKS 2023\templates\Part.prtdot", 0, 0, 0)

Opens a new part document in SolidWorks via API.

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Add a Sketch on Front Plane

Dim swSketchMgr As SketchManager
Set swSketchMgr = swPart.SketchManager
swPart.Extension.SelectByID2 "Front Plane", "PLANE", 0, 0, 0, False, 0, Nothing, 0
swSketchMgr.InsertSketch True

Creates a new sketch on the front plane.

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Draw a Line in Sketch

Dim line As SketchSegment
Set line = swSketchMgr.CreateLine(0, 0, 0, 0.1, 0.1, 0)

Draws a line between two points in the active sketch.

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Draw a Circle in Sketch

Dim circle As SketchSegment
Set circle = swSketchMgr.CreateCircleByRadius(0, 0, 0, 0.05)

Creates a circle at a specified center with a given radius.

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Extrude a Sketch

swPart.FeatureManager.FeatureExtrusion2 True, False, False, 0, 0, 0.1, 0, False, False, False, False, 0, 0, False, False, False, False, True, False, False

Extrudes the selected sketch to create a 3D solid.

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Create a Rectangle Sketch

Dim p1, p2, p3, p4 As SketchSegment
Set p1 = swSketchMgr.CreateLine(0, 0, 0, 0.1, 0, 0)
Set p2 = swSketchMgr.CreateLine(0.1, 0, 0, 0.1, 0.05, 0)
Set p3 = swSketchMgr.CreateLine(0.1, 0.05, 0, 0, 0.05, 0)
Set p4 = swSketchMgr.CreateLine(0, 0.05, 0, 0, 0, 0)

Draws a rectangle using four lines in a sketch.

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Apply Fillet to Edge

swPart.Extension.SelectByID2 "Edge1", "EDGE", 0, 0, 0, False, 0, Nothing, 0
swPart.FeatureManager.InsertFeatureFillet 5, 0.01, 0, 0, 0, 0, 0, 0

Applies a fillet to a selected edge in a part.

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Add Material to Part

swPart.SetMaterialPropertyName2 "Default", "Steel"

Assigns a material to the active part document.

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Create a Circular Pattern

swPart.Extension.SelectByID2 "Boss-Extrude1", "BODYFEATURE", 0, 0, 0, False, 0, Nothing, 0
swPart.Extension.SelectByID2 "Axis1", "AXIS", 0, 0, 0, True, 0, Nothing, 0
swPart.FeatureManager.FeatureCircularPattern3 6, 360, False, True, True, True, False, 0, 0, False

Creates a circular pattern of a feature around an axis.

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Save Part Document

swPart.SaveAs "C:\Users\Public\Documents\SolidWorks\part1.sldprt"

Saves the active part document to a specified path.

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Frequently Asked Questions about Solidworks-api

What is Solidworks-api?

What are the primary use cases for Solidworks-api?

Automate repetitive modeling or drawing tasks. Create custom add-ins for design processes. Integrate SolidWorks with PLM/ERP databases. Generate reports and BOMs automatically. Custom tools for design validation and rule enforcement

What are the strengths of Solidworks-api?

Reduces repetitive manual CAD operations. Enables company-specific design rules and standards. Improves design productivity and consistency. Integrates seamlessly with existing SolidWorks environment. Supports complex workflows for large assemblies

What are the limitations of Solidworks-api?

Requires knowledge of COM and SolidWorks object model. Performance can be limited for very large assemblies. Learning curve for VBA/.NET or C# integration. Limited cross-platform support (Windows only). API changes between SolidWorks versions can affect macros/add-ins

How can I practice Solidworks-api typing speed?

CodeSpeedTest offers 10+ real Solidworks-api code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Code Sample Descriptions

Create a New Part Document

Dim swApp As SldWorks.SldWorks
Dim swPart As ModelDoc2
Set swApp = Application.SldWorks
Set swPart = swApp.NewDocument("C:\ProgramData\SolidWorks\SOLIDWORKS 2023\templates\Part.prtdot", 0, 0, 0)

Opens a new part document in SolidWorks via API.

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Add a Sketch on Front Plane

Dim swSketchMgr As SketchManager
Set swSketchMgr = swPart.SketchManager
swPart.Extension.SelectByID2 "Front Plane", "PLANE", 0, 0, 0, False, 0, Nothing, 0
swSketchMgr.InsertSketch True

Creates a new sketch on the front plane.

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Draw a Line in Sketch

Dim line As SketchSegment
Set line = swSketchMgr.CreateLine(0, 0, 0, 0.1, 0.1, 0)

Draws a line between two points in the active sketch.

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Draw a Circle in Sketch

Dim circle As SketchSegment
Set circle = swSketchMgr.CreateCircleByRadius(0, 0, 0, 0.05)

Creates a circle at a specified center with a given radius.

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Extrude a Sketch

swPart.FeatureManager.FeatureExtrusion2 True, False, False, 0, 0, 0.1, 0, False, False, False, False, 0, 0, False, False, False, False, True, False, False

Extrudes the selected sketch to create a 3D solid.

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Create a Rectangle Sketch

Dim p1, p2, p3, p4 As SketchSegment
Set p1 = swSketchMgr.CreateLine(0, 0, 0, 0.1, 0, 0)
Set p2 = swSketchMgr.CreateLine(0.1, 0, 0, 0.1, 0.05, 0)
Set p3 = swSketchMgr.CreateLine(0.1, 0.05, 0, 0, 0.05, 0)
Set p4 = swSketchMgr.CreateLine(0, 0.05, 0, 0, 0, 0)

Draws a rectangle using four lines in a sketch.

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Apply Fillet to Edge

swPart.Extension.SelectByID2 "Edge1", "EDGE", 0, 0, 0, False, 0, Nothing, 0
swPart.FeatureManager.InsertFeatureFillet 5, 0.01, 0, 0, 0, 0, 0, 0

Applies a fillet to a selected edge in a part.

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Add Material to Part

swPart.SetMaterialPropertyName2 "Default", "Steel"

Assigns a material to the active part document.

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Create a Circular Pattern

swPart.Extension.SelectByID2 "Boss-Extrude1", "BODYFEATURE", 0, 0, 0, False, 0, Nothing, 0
swPart.Extension.SelectByID2 "Axis1", "AXIS", 0, 0, 0, True, 0, Nothing, 0
swPart.FeatureManager.FeatureCircularPattern3 6, 360, False, True, True, True, False, 0, 0, False

Creates a circular pattern of a feature around an axis.

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Save Part Document

swPart.SaveAs "C:\Users\Public\Documents\SolidWorks\part1.sldprt"

Saves the active part document to a specified path.

Let’s Try →

Frequently Asked Questions about Solidworks-api

What is Solidworks-api?

What are the primary use cases for Solidworks-api?

What are the strengths of Solidworks-api?

What are the limitations of Solidworks-api?

How can I practice Solidworks-api typing speed?

CodeSpeedTest offers 10+ real Solidworks-api code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.