Taxi Fare 的士車費:
市區	(2km)$24.0	( 7km)$1.7	$1.2
新界	(2km)$20.5	( 6km)$1.5	$1.2
大嶼山	(2km)$19.0	(18km)$1.5	$1.4
http://www.ablmcc.edu.hk/~scy/home/javascript/taxi-fare.htm

宣告
double x1,x2,x3;

trackBar1 (min 0, max 300) 代表 0.0 - 30.0 km
	SmallChange 10
	LargeChange 20

trackBar1_Scroll
	double n = trackBar1.Value;	// ?km
	textBox1 = (?km)
	x1 = $?	textBox2 = x1? 車費1
	x2 = $?	textBox3 = x2? 車費2
	x3 = $?	textBox4 = x3? 車費3
	// 移動的士
	pictureBox1.Location
	= new Point((int)x1, pictureBox1.Location.Y);

pictureBox1,2,3 (SideMode:StretchImage)
	redtaxi.jpg,greentaxi.jpg,bluetaxi.jpg

Form1_Load
	trackBar1_Scroll(sender,e);

	市區	新界	大嶼山
1.8 km	$ 24.0	$ 20.5	$ 19.0
2.0 km	$ 24.0	$ 20.5	$ 19.0
2.2 km	$ 25.7	$ 22.0	$ 20.5
2.4 km	$ 27.4	$ 23.5	$ 22.0
2.6 km	$ 29.1	$ 25.0	$ 23.5
2.8 km	$ 30.8	$ 26.5	$ 25.0
3.0 km	$ 32.5	$ 28.0	$ 26.5