1. Fonts, TabControl, ListBox
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2. Naming Be careful to give distinct things distinct names.
E.g. don’t name the form Random since there is a Random class in VB.
E.g. Don’t give a form and a usercontrol the same name.
Hungarian prefixes are useful here.
If you use FrmRandom or UscRandom, etc. you less likely to come up with conflicting names.
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3. Changing Font
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4. Return of Font Change (Start up)
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5. Choose a Font Name and a Font Size and click button
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6. Declare class variables including Font and FontStyle
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7. RadioButton event methods
Handling multiple events
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8. Button click event method
Instantiates a new font based on user’s selections.
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9. Form load event method
Determine font name and size that are there from beginning in case user clicks buttons without having made radiobutton selections.
Note lblMessage.Font.Name is OK on the right-hand-side of an assignment statement.
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10. Method 2: Declare object in click method
Object is declared in click event and is re-established with each click event and can be instantiated with each click event.
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11. TabControl
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12. TabControl and TabPages
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13. Add a TabControl to a form, rename it, the prefix is tbc
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14. Right click on the TabControl and choose Add Tab
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15. Result: TabPage1 is added to TabControl
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16. Click on TabPage1 (below the tab), rename it, the prefix is tbp
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17. Change the Text property
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18. Right click again on the tab control (in the tabbing region) and add a second page
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19. The TabPages are like Panels or GroupBoxes and serves as containers for controls
Addition TabPage controls
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20. Subtraction TabPage Controls – These are distinct from the controls on the previous TabPage
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21. Declaring “class” variables
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22. Form Load Event Method
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23. Code for Clicking button on addition TabPage
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24. Code for Clicking button on addition TabPage (Cont.)
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25. Code for Clicking button on subtraction TabPage
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26. Code for Clicking button on subtraction TabPage (Cont.)
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27. ListBoxes
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28. Entering Items into a ListBox
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29. User enters name into TextBox and clicks Enter
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30. TextBox is cleared and name is entered as first item in list
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31. First name at top, successive names underneath
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32. Code to add item to list and clear textbox
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33. Select item from list then click Remove button
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34. After Selecting an item from list then clicking Remove button
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35. Remove code
SelectedIndex is a property of a ListBox that tells the programmer which item is highlighted. If no items are highlighted, it is –1.
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36. Another kind of remove
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37. Another kind of remove (Cont.)
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38. Nothing happens, no error
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39. Another kind of remove (Cont.)
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