Vb Important Question per Chapters 7,8,9

 Chapter 07 –

1. Explain List Box and Combo Box controls.

2. Name and describe the three styles of combo boxes.

3. Explain the following properties –

a. ListCount

b. ListIndex

c. List

d. AddItem

e. Clear

f. RemoveItem

g. Sorted

4. What are the different loop-constructs in VB?

5. Explain the difference between a pretest and a posttest in a Do/Loop.

6. Explain the differences between a Do/Loop and a For/Next loop.

7. How do the Left, Right, Mid and Len functions operate?

8. What is the purpose of Printer.Print? How do you control the horizontal spacing of printer output?

 Chapter 08 –

1. Define the following terms –

a. Array

b. Element

c. Subscript

d. Array of controls

e. Subscripted variable

2. Why would a list box control need both a ListIndex property and an ItemData property?

3. How to setup and use a control array?

4. Explain Select Case statement with an example.

5. Explain the use of For Each/Next in traversing the array.

6. Write a short note on user defined data types. Give an example.

7. What do you mean by multidimensional array? How do we implement it?

 Chapter 09 –

1. Explain the difference between ByVal and ByRef. When is each used?

2. What actions trigger the Initialize event and the Terminate event of an object?

3. What is a collection? Name two collections that are automatically built into VB.

4. What properties and methods are provided by the Collection object?

5. Write short notes on key features of object-oriented language.

6. Write a short note on class module.

7. Write a short note on Property Procedures.

8. (How do we create a new object using a class?) What are the three choices of creating a new object?

9. Explain early binding versus late binding.

10. Explain the following –

a. ActiveX control with an example

b. A DLL (Dynamic Link Library)?

c. API (Application Programming Interface)