本文演示了在C#中使用画笔的源代码，供大家参考使用。下面的源代码中首先定义了一个矩形类（Rectangle），这个类从Shape类中派生出来，在类中定义了两个变量成员来代表画笔的起点和终点。

public class Rectangle : Shape { protected Point m_Start; protected Point m_End; public Rectangle(Point start, Point end, Color fgColor) { m_Start = start; m_End = end; m_Color = fgColor; } public override void Draw(Form canvas) { if (canvas == null) { return; } InitializeGraphics(canvas); Point startPoint = canvas.PointToScreen(m_Start); Point endPoint = canvas.PointToScreen(m_End); MainForm mainForm = (MainForm)canvas; Color bgColor = GetBackgroundColor(m_Color); Size rectSize = new Size(m_End.X - m_Start.X, m_End.Y - m_Start.Y); System.Drawing.Rectangle rectToDraw = new System.Drawing.Rectangle(startPoint, rectSize); ControlPaint.DrawReversibleFrame(rectToDraw, bgColor, FrameStyle.Thick); } }

作者:jspfuns(原创)