CANVAS.MOVETO(0,0);
Canvas.Pen.Style :=psSolid;//样式
Canvas.Pen.Color :=clRed ;//颜色
Canvas.Pen.Width := 5;//宽度
CANVAS.LINETO(100,100);
设置Pen属性的Color属性和Width属性.....多去查帮助不然就就问谷歌
Canvas.Pen.Color := clRed;
Canvas.Pen.Width := 3;
Canvas.Pen.Width := 1这个控制线宽。。Canvas.Pen.Color这个控制颜色