1. form1
Runner
pictureBox1
imageList1
timer1
label1
原地跑步計時
label2
共用了…秒
button1 開始
button2 停止

2. int no;
DateTime timeNow;
private void Form1_Load(object sender, EventArgs e) {
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
no = 0;
pictureBox1.Image = imageList1.Images[no]; // 第0張圖
timer1.Interval = 100; // 每隔0.1秒，換圖 }
private void btnStart_Click(object sender, EventArgs e) {
timer1.Enabled = true;
timeNow = DateTime.Now; // 現時時間 }
private void btnStop_Click(object sender, EventArgs e) {
timer1.Enabled = false;
lblMsg.Text = "共用了 "
+(DateTime.Now-timeNow).TotalSeconds.ToString("0.00")
+ "秒"; }

3. private void timer1_Tick(object sender, EventArgs e){
switch (no%4){
case 0: … // 換圖
case 1: …
case 2: …
case 3: … }