1. label1 Name label2 Time (0-23) textBox1 textBox2 textBox3 button1
再按F5開始偵錯 (執行)
label1
Name
label2
Time (0-23)
textBox1
textBox2
textBox3
button1
&Submit
form1
Greeting
pictureBox1
SizeMode(zoom)
txtName
txtTime
txtMsg
其他屬性:
BackColor BackgroundImage
MaximumSize Font
MinimumSize ForeColor Image SizeMode
Enabled Size StartPosition
TextAlign Text Visible
by Szeto CY
Visual C# 2008

2. 雙按按鈕(Submit)，並加入以下程式碼：
private void button1_Click(object sender, EventArgs e) {
txtMsg.Text = " Mr." + txtName.Text; }
右按，選檢視程式碼，修改程式碼：
private void button1_Click(object sender, EventArgs e) {
int hh = int.Parse(txtTime.Text);
txtMsg.Text = hh.ToString("00"); }
修改程式碼：
private void button1_Click(object sender, EventArgs e) {
int hh = 999;
txtMsg.Text = txtName.Text + hh; }
by Szeto CY
Visual C# 2008

3. private void button1_Click(object sender, EventArgs e) {
修改程式碼：
private void button1_Click(object sender, EventArgs e) {
int hh = int.Parse(txtTime.Text); }
if (hh < 12) txtMsg.Text = "Good Morning";
else if (hh < 18) txtMsg.Text = "Good Afternoon";
else txtMsg.Text = "Good Evening";
txtMsg.Text += " Mr." + txtName.Text;
假若使用者沒有輸入時間，會如何?
int hh = int.Parse(txtTime.Text);
by Szeto CY
Visual C# 2008

4. private void button1_Click(object sender, EventArgs e) { try
修改程式碼：
private void button1_Click(object sender, EventArgs e) {
try
int hh = int.Parse(txtTime.Text); }
catch
txtMsg.Text = "Error";
if (hh < 12) txtMsg.Text = "Good Morning";
else if (hh < 18) txtMsg.Text = "Good Afternoon";
else txtMsg.Text = "Good Evening";
txtMsg.Text += " Mr." + txtName.Text;
by Szeto CY
Visual C# 2008