1. Visual Basic.NET Comprehensive Concepts and Techniques Chapter 7 Using Menus, Common Dialogs, Procedures, Functions, and Arrays

2. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 2 Objectives Add a menu bar and menus to an application using the MainMenu control Add a shortcut menu to an application using the ContextMenu control Use the StatusBar control in an application Use the PictureBox control in an application Use common dialog boxes in an application to interact with the user

3. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 3 Objectives Use one-dimensional and multidimensional arrays in code Write a function procedure to return a value Write a sub procedure Write code to pass arguments to function and sub procedures

4. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 4 Objectives Describe the two methods for passing arguments to functions and procedures Create an enhanced message box with the MessageBox.Show() method Use a collection of controls to access properties and methods in code

5. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 5

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7. 7 Creating the User Interface Open a New Project named Know Your Dogs Quiz in the Chapter7 folder on your Data Disk Set the following properties for your form

8. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 8 Adding Controls Add a StatusBar control by dragging the StatusBar button from the Toolbox window to the bottom of the Form1 form Add one PictureBox, one GroupBox, four RadioButtons inside the GroupBox, and two Buttons Add a ContextMenu control Add a FontDialog control Set the control properties as they appear in table 7-4 on pages VB 7.19 – VB 7.21

9. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 9 Creating Menus on a Menu Bar Click the MainMenu1 control in the Component Tray Click the Type Here indicator in the Menu Designer. Type &File as the Text property value to create the File menu on the menu bar, and press the ENTER key Set the Name property for the File menu item as indicated in Table 7-6 on page VB 7.24 Click the Type Here indicator below the File menu item in the Menu Designer. Type E&xit as the Text property value

10. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 10 Creating Menus on a Menu Bar Create the remaining menus and menu items as shown in Table 7-6 on page VB 7.24 To add a Separator Bar, right-click the area in the Menu Designer you want the Separator Bar to appear, and select Insert Separator from the shortcut menu Adding an ampersand (&) before a letter in the Text property of a menu designates that letter as a keyboard shortcut key Rename the MainMenu control to mnuMain

11. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 11 Creating a Shortcut Menu for a Form Click the ContextMenu1 control in the Component Tray Click the Context Menu indicator. When the Type Here indicator appears, add the menu items appearing in Table 7-7 on page VB 7.30 To insert a Separator Bar, type a dash (-) for the menu item Select the ContextMenu1 control in the Component Tray and set the control’s Name property value to cmuShortcut Select the Form1 form. Set the ContextMenu property in the Properties window to cmuShortcut

12. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 12 The StatusBar

13. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 13 Changing the Properties of a StatusBar Control Click the StatusBar1 control on the Form1 form. Change the Name property to stbQuestion. Select the Panels property in the Properties window and then click the Panels property ellipsis button Click the Add button. When the StatusBarPanel1 panel is added, select the AutoSize property and then click the AutoSize box arrow

14. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 14 Changing the Properties of a StatusBar Control Click the Spring property value and then click the OK button. When the StatusBarPanel Collection Editor window closes, select the ShowPanels property in the Properties window and change the ShowPanels property to True

15. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 15 The PictureBox Commonly used properties of the PictureBox control

16. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 16 Changing the Properties of a PictureBox Control Click the PictureBox1 control and set the properties in the properties window to those specified below

17. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 17

18. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 18 Common Dialog Controls Windows applications often share requirements for certain types of input Applications use similar dialog boxes to open, print, preview, or save a file ShowDialog() method

19. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 19 FontDialog Control Properties

20. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 20 Changing the Properties of a FontDialog Control Click the FontDialog1 control and change the property values listed below

21. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 21 Arrays Allows programmers to represent many values with one variable name Elements in the array are distinguished by their subscript

22. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 22 The Dim Statement for Arrays

23. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 23 Dynamic Dimensioning of Arrays Has a variable or expression for its upper- bound value Visual Basic.NET permits the size of an array in a Dim statement to be written as a simple variable Dim intCode(gintSize) As Integer

24. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 24 Declaring Arrays Right-Click the Form1 form in the Solution Explorer. Click the View Code command Enter Option Strict On as the first line of code in the code window Enter the code below, starting on line 320

25. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 25 Indexes Elements in an array are referenced in code by their index

26. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 26 Function Procedures Performs tasks and returns a value back to the code that called it Similar to VB.NET’s intrinsic functions Function statements declare function procedures –Private Function InventoryCounts() As Integer() Common Statements in Functions –Return statement –Exit Function statement –End Function statement

27. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 27 Declaring a Function Procedure and Using Arrays in Code Enter the code below, starting on line 333

28. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 28 Coding the Menu Command and Using the FontDialog Control in Code Click the Form1.vb tab in the main work area. Double-click the Exit command on the File menu of the Form1 form Type line 345 (shown on the next slide) in the code window Click the Design tab in the main work area, double-click the Font command on the Options menu, and type lines 349 through 355 shown on the next slide

29. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 29

30. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 30 Multidimensional Arrays

31. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 31 Declaring a Two-Dimensional Array Enter lines 331 through 339 as shown below _

32. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 32 Array Methods

33. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 33 Declaring Sub Procedures

34. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 34 Passing Arguments Between Procedures Passing By Value method –ByVal keyword –Passes the value of the variable (default method) –CalculateTax((dblIncome), intTaxBracket) Passing By Reference method –ByRef keyword –Passes the reference location of the variable –Allows you to modify the variable –Private Sub CalculateTax(ByRef dblValue As Double)

35. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 35 Coding a Sub Procedure

36. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 36 Coding a Sub Procedure Enter line 342 as shown below, and press ENTER Enter lines 343 through 366 as shown below

37. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 37 Enhanced MessageBox Features

38. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 38 Using an Array and an Enhanced Message Box

39. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 39 Coding an Array Method and Enhanced MessageBox Enter lines 367 through 385 as shown below

40. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 40 Using a Control Collection

41. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 41 Using a Control Collection Enter lines 386 through 403 as shown below

42. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 42 Calling a Sub Procedure Code the five event procedures as shown on the following slide –Form1_Load –mnuFirst_Click –mnuLast_Click –mnuNext_Click –mnuPrevious_Click

43. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 43

44. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 44 Using the PerformClick() Method Used when you want to execute the Click event procedure for a control Ensures visual effects are handled, in addition to calling the Click event procedure Best used when several event procedures perform duplicate actions Enter the code on the following slide for the seven event procedures shown

45. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 45

46. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 46 Finish the Project Click the Save All button on the Standard toolbar Test your project by taking the Know Your Dogs quiz. Test the MainMenu and the ContextMenu Print your program’s documentation Quit Visual Basic.NET

47. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 47 Summary Add a menu bar and menus to an application using the MainMenu control Add a shortcut menu to an application using the ContextMenu control Use the StatusBar control in an application Use the PictureBox control in an application Use common dialog boxes in an application to interact with the user

48. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 48 Summary Use one-dimensional and multidimensional arrays in code Write a function procedure to return a value Write a sub procedure Write code to pass arguments to function and sub procedures

49. Chapter 7: Using Menus, Common Dialogs, Procedures, Functions, and Arrays 49 Summary Describe the two methods for passing arguments to functions and procedures Create an enhanced message box with the MessageBox.Show() method Use a collection of controls to access properties and methods in code

50. Visual Basic.NET Comprehensive Concepts and Techniques Chapter 7 Complete