1. VBA (Visual Basic for Applications) What is Excel, just a spreadsheet?
Time for demos...
by Christian Brade

2. Time for demos... Snake game Speed game SMS sender Excel with movies
Sudoku solver
Etc.

3. What is a macro
Small computer program, that needs to run within another program.
Collection of instructions for the computer.
Automates a task for you.
What you would normally need several clicks for can now be done with one click.
Reduces the risk of errors.
Control hole computer, not just MsExcel tasks. 3

4. Recording macros MS Office has a built-in recorder.
You can record anything you can do yourself in Excel (in theory).
You can use the recorder without knowing any VBA commands.
You can edit marcros in VBE (Visual Basic Editor)
Macros will be generated to Modules in VBE

5. Excercise 1 Start recording Type your name to cell E1
Autowidth column E (doubleclick)
Stop recording
Check the macro from module1
Clear your name from cell E1 and resize the column to original width
Run the macro

6. Excercise 2 Start recording Type your name to cells E1, F2 and G3
Autowidth columns E, F, and G
Stop recording
Try to shorten the code as much as possible in the module
Clear your name from cells and resize the columns to original width. Run the macro.

7. VBA –programming: Basic elements
If -sentence
Loop -structures
Event-Run programs
Microsoft Visual Basic Help <F1>
’ –to comment lines in a code (apostrophe)

8. VBA –programming: Basic elements
If -sentence
If value = true Then
do this
Else*
do that*
End If
Workbook If(value=true;this;that)
*Voluntary

9. VBA –programming: Basic elements
Enhanced If -sentence
If value = 1 Then
MsgBox "1.choise”
ElseIf value = 2 Then
MsgBox "2.choise"
Else
MsgBox ”No choise”
End If

10. VBA –programming: Basic elements
Excercise III
Code a macro what reads a number from the cell A1 and multiplies it by 2 If the number is smaller than 100.
Code the program to Module and name it ExcerciseIII
Sub ExcerciseIII …
End Sub

11. Assigning macros to buttons
View – Toolbars – Form – Button
Click and draw -> Add macro

12. VBA –programming: Basic elements
Excercise IIIb
Assign a button to excercise III

13. VBA –programming: Basic elements
Enhanced If –sentence (And and Or)
If value = 1 Or value = 2 Then
MsgBox ”Value is 1 or 2”
ElseIf value >= 2 And value <=3 Then
MsgBox ”Value is between 2 and 3”
Else
MsgBox ”No value”
End If

14. VBA –programming: Basic elements
Excercise IV
Code a macro what reads numbers from the cells A1 and B1.
If B1 is greater than A1 change the values. A1 gets the value of B1 and B1 gets the value of A1.
If B1 is not greater than A1, divide the numbers by 2.
The macro will be started from a button.

15. VBA –programming: Basic elements
Do Loop While
i = 1 Do
Range("A" & i).Value = i
i = i + 1
Loop While i < 100
What does the loop do?

16. VBA –programming: Basic elements
For Next
For i = 1 To 100
Range("A" & i).Value = i
Next
What does the loop do?
To quit eternal loop <Ctrl+Break>

17. VBA –programming: Basic elements
Excercise V
Code a macro what types the multiplication table of number 3 to 100.
The macro will be started from a button.
1 * 3 = 3
2 * 3 = 6
3 * 3 = 9 …
100 * 3 = 300

18. VBA –programming: Basic elements
Excercise VI
Code a macro what types to column N, row 1 one *,
to row 2 ** and finally to row 10 **********.
The macro will be started from a button. * **
*** …
**********

19. Visual Basic Editor (VBE) Alt+F11
Place for Event-Run Macros to each Worksheet (Like Worksheet_Change )
Place for Event-Run Macros to whole Workbook (Like Workbook_Open)
Place for user-defined Macros and function + global variables (Like HelloWorld)

20. Creating the Code. What do We Need?
Understand the MS Office object model
Access to the Visual Basic Editor VBE
Basic programming skills
Motivation

21. The Object Model. Why bother?
Excel (and the other Office applications) consist of a number of objects
Macro programming is actually just manipulation of these objects
When you understand the basic principle, it’s easier to learn how to program other Office programs
Press a dot after the object and you will the subobjects, properties and methods

22. Definition of an object
An object is a named part of a computers memory
It has certain features or properties, like some people have brown hair, others red hair etc.
It has some functionality or methods, like people are able to walk or cars able to drive
Objects can contain other objects

23. An example – A box Object properties Size Color Position
The object might have a move method.

24. The Objects in Excel The mother object is called an ”Application”
An application contains a number of workbooks.
These workbooks contain sheets.
The sheets contain ranges etc.
Application, Workbooks etc. contain many other objects, properties and methods.

25. Excercise VII
Try to find out who is the user of Excel (=application) at the moment.
Find a function ”at the moment”
Use MsgBox to show info to the user
Start the Macro from button

26. Event-run Macros Normal Macros are run manually
Run from Buttons, Shortcuts
Event-run macros will be started automatically. They are started from an event (like Workbook_Open())
Major virus alert! If you open an application with Workbook_Open() Macro, the macro will be run.

27. Security levels Tools – Macros – Security
If your macro doesn’t work in another computer, try to choose Medium level.
Never Low!!!

28. Excercise VIII
Code a macro that requires a user’s name and types it to cell A1 when entering to WorkSheet 1
Use InputBox()

29. Excercise IX
Code a macro that automatically saves the file when closing it

30. What does the code do? Private Sub Workbook_Open()
Dim Users(2) As String
Dim Found as Boolean
Found=False
Users(0) = "Christian Brade"
Users(1) = "Elvis Presley"
Users(2) = "George Bush"
For i = 0 To UBound(Users)
If Application.UserName = Users(i) Then
Found=True
End If
Next
If Found=False Then
Application.ActiveWorkbook.Close
End if
End Sub
What does the code do?

31. Final advice
If you wonder how a certain operation is done, record it and look it from the code.
Place the cursor over a keyword and press F1 for help on that word.

32. Thank You!