docs-desktop/dotnet-desktop-guide/framework/winforms/advanced/how-to-draw-a-line-on-a-windows-form.md

title, description, ms.date, dev_langs, f1_keywords, helpviewer_keywords, ms.assetid

title	description	ms.date	dev_langs	f1_keywords	helpviewer_keywords	ms.assetid
How to: Draw a Line on a Windows Form	Learn how to draws a line on a form by handling the Paint event, and then perform the drawing using the Graphics property of the PaintEventArgs.	03/30/2017	csharp vb	Graphics.DrawLine	examples [Windows Forms], drawing lines on forms drawing [Windows Forms], lines lines [Windows Forms], drawing drawing lines	55c1dbeb-75d0-430c-9814-a24b8971ad8c

How to: Draw a Line on a Windows Form

This example draws a line on a form. Typically, when you draw on a form, you handle the form’s xref:System.Windows.Forms.Control.Paint event and perform the drawing using the xref:System.Windows.Forms.PaintEventArgs.Graphics%2A property of the xref:System.Windows.Forms.PaintEventArgs, as shown in this example

Example

[!code-csharpSystem.Drawing.UsingAPen#11] [!code-vbSystem.Drawing.UsingAPen#11]

Compiling the Code

The preceding example is designed for use with Windows Forms, and it requires xref:System.Windows.Forms.PaintEventArgse, which is a parameter of the xref:System.Windows.Forms.Control.Paint event handler.

Robust Programming

You should always call xref:System.IDisposable.Dispose%2A on any objects that consume system resources, such as xref:System.Drawing.Pen objects.

See also

• xref:System.Drawing.Graphics.DrawLine%2A
• xref:System.Windows.Forms.Control.OnPaint%2A
• Getting Started with Graphics Programming
• Using a Pen to Draw Lines and Shapes
• Graphics and Drawing in Windows Forms