How to: Draw a Filled Rectangle on a Windows Form

This example draws a filled rectangle on a form.

Example

Dim myBrush As New System.Drawing.SolidBrush(System.Drawing.Color.Red)
Dim formGraphics As System.Drawing.Graphics
formGraphics = Me.CreateGraphics()
formGraphics.FillRectangle(myBrush, New Rectangle(0, 0, 200, 300))
myBrush.Dispose()
formGraphics.Dispose()

System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
System.Drawing.Graphics formGraphics;
formGraphics = this.CreateGraphics();
formGraphics.FillRectangle(myBrush, new Rectangle(0, 0, 200, 300));
myBrush.Dispose();
formGraphics.Dispose();

System::Drawing::SolidBrush^ myBrush =
    gcnew System::Drawing::SolidBrush(System::Drawing::Color::Red);
System::Drawing::Graphics^ formGraphics;
formGraphics = this->CreateGraphics();
formGraphics->FillRectangle(myBrush, Rectangle(0, 0, 200, 300));
delete myBrush;
delete formGraphics;

Compiling the Code

You cannot call this method in the Load event handler. The drawn content will not be redrawn if the form is resized or obscured by another form. To make your content automatically repaint, you should override the OnPaint method.

Robust Programming

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

See Also

Reference

FillRectangle
OnPaint

Concepts

Brushes and Filled Shapes in GDI+

Other Resources

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