A Programmer's Guide to .NET

11.4. System.Drawing namespace

The main class in this namespace is Graphics. It provides the device context for drawing. We can create device contexts from handles by using the FromHDC(IntPtr ) method, Windows handles by using the FromHWnd(IntPtr ) method, and images by using the FromImage(Image ) method. After we get the device context, we can manipulate regions, perform rendering and transformation, work with metafiles, and draw various geometric figures – arcs, Bezier curves, ellipses, lines, and so on – on the device surface. This is supported by the set of DrawXXX methods shown below:

• DrawArc;

• DrawBezier;

• DrawClosedCurve;

• DrawCurve;

• DrawEllipse;

• DrawIcon;

• DrawImage;

• DrawImageUnscaled;

• DrawLine;

• DrawLines;

• DrawPath;

• DrawPie;

• DrawPolygon;

• DrawRectangle ...