The document discusses various form controls and techniques in Windows Forms applications, including: - Message boxes for displaying information to users - Validating textbox input to only allow certain characters - Minimizing, maximizing and restoring a form's window state - Clearing text from textboxes and comboboxes in a form - Radio buttons, check boxes, and list boxes - Creating timers and tabbed dialog boxes - Adding menu items, shortcuts, and toolbars - Creating multiple document interface (MDI) forms with a parent window containing child windows.

1. Working with Form
Chapter II

2. Message Boxes
• A message box is a special dialog box used to display a piece of information to user.
– MessageBox class
– EX:
MessageBox.Show("Hello, how are you?","My SMS");
MessageBox.Show("Welcome to the Wonderful World of Visual C#","Visual C#
Tutorials", MessageBoxButtons.OKCancel);
MessageBox.Show("Your order appears to be correct" +
"nAre you ready to provide your credit card information?",
"Customer Order Processing",
MessageBoxButtons.YesNoCancel,
MessageBoxIcon.Information);

3. EX:
MessageBox.Show("Your order appears to be correct" +
"nAre you ready to provide your credit card information?",
"Customer Order Processing",
MessageBoxButtons.YesNoCancel,
MessageBoxIcon.Information,
MessageBoxDefaultButton.Button1);
NOTE:Button1 , Button2 , Button3

4. private void txtNumber_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar >= 'a' && e.KeyChar <= 'z') || (e.KeyChar >= 'A' && e.KeyChar <= 'Z') || e.KeyChar==' ')
{
e.Handled =true;
}
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar >= '0' && e.KeyChar <= '9'))
{
e.Handled = true;
}
}
Note: || (e.KeyChar == (char)Keys.Back)

5. 1. Button
2. OpenFileDialog Control
3. Picture Box

6. this.WindowState = FormWindowState.Minimized;
this.WindowState = FormWindowState.Normal;
this.WindowState = FormWindowState.Maximized;
EX:
foreach (Control c in this.Controls)
{
TextBox t = c as TextBox;
ComboBox cbo = c as ComboBox;
if (t != null)
{
t.Text = " ";
}
else if (cbo != null)
{
cbo.Text = " ";
}
}

7. Radiobutton and CheckBox

8. ListBox

9. Creating Timers

10. Creating Tabbed Dialog Boxes

11. Creating List View

12. 1. Adding Menu Items
2. Creating Checked Menu Items
3. Assigning Shortcut Keys
4. Using the Toolbar Control

13. Creating MDI Forms
All the projects you've created so far have been single-document interface (SDI) projects. In SDI
programs, every form in the application is a peer of all other forms; no intrinsic hierarchy exists
between forms. C# also lets you create multiple-document interface (MDI) programs. A MDI
program contains one parent window (also called a container) and one or more child windows.
A classic example of a MDI program is Microsoft Word 95 (200 behaves slightly different,
depending on how it's set up).

14. this.Hide();
Form2 frm2 = new Form2();
frm2.Show();