GDI+ is a graphics programming interface developed by Microsoft that allows developers to create and manipulate images and graphics in their applications. It is an extension of the original GDI (Graphics Device Interface) and provides enhanced features for rendering 2D graphics, handling images, and working with fonts. GDI+ supports various image formats, including JPEG, PNG, and GIF, making it versatile for different graphic needs. With GDI+, developers can draw shapes, text, and images on the screen or in print, offering a rich set of tools for creating visually appealing applications. It is commonly used in Windows applications and is integrated into the Microsoft .NET Framework, allowing for easier access and use in software development.