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 Paint event and perform the drawing using the Graphics property of the PaintEventArgs, as shown in this example

Example

Pen pen = new Pen(Color.FromArgb(255, 0, 0, 0));
e.Graphics.DrawLine(pen, 20, 10, 300, 100);
Dim pen As New Pen(Color.FromArgb(255, 0, 0, 0))
e.Graphics.DrawLine(pen, 20, 10, 300, 100)

Compiling the Code

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

Robust Programming

You should always call Dispose on any objects that consume system resources, such as Pen objects.

See Also

DrawLine
OnPaint
Getting Started with Graphics Programming
Using a Pen to Draw Lines and Shapes
Graphics and Drawing in Windows Forms