1. Excel Functions

2. Part 1. Introduction

3. An Excel function is a formula or a procedure that is performed in the Visual Basic environment, outside the Excel spreadsheet.

4. For example, the sum of two variables can be evaluated in an Excel spreadsheet as follows:

5. Sum of two variables in an Excel spreadsheet

6. This same sum can be done in the environment of Visual Basic (VB)

7. You can define a function called "Sum", which receives the value of two inputs "x" and "y" and returns the value of the sum of them

8. How to build the function "Sum"

9. - Click on the "Programmer" tab

10. If the tab is not available, see Note 1 "Activate tab" at the end of the document. - Click on the "Programmer" tab

11. - Click on the "Programmer" tab

12. Clickon "viewcode"

13. The "Visual Basic" ambient is open

14. Function code

15. Function code The codes are written in the VB "Modules"

16. Function code The codes are written in the VB "Modules" To open a module

17. Function code The codes are written in the VB "Modules" To open a module Click right button on the left side window

18. Function code The codes are written in the VB "Modules" To open a module Click right button on the left side window It opens a window

19. Select “Insert”

20. Click Module

21. Appears the new created VB module, with the name Module1. This name can be changed later by a more suitable one.

22. The right window displays a flashing line

23. The right window displays a flashing line The module is now ready for use

24. Sum Function Code

25. Código de la función Suma In the right window type the function name followed by the dependent variables.

26. Código de la función Suma In the right window type the function name followed by the dependent variables Function Suma(x,y)

27. Código de la función Suma In the right window type the function name followed by the dependent variables. Function Suma(x,y) When you "Enter", VB automatically puts the final line of the function.

28. Sum Function Code In the right window type the function name followed by the dependent variables. Function Suma(x,y) End Function

29. The new code must be written between these two commands.

30. The new code must be written between these two commands. In this case, the code consists of a single line

31. The new code must be written between these two commands. In this case, the code consists of a single line Suma = x + y

32. The complete function looks like

33. Application of the Sum function in the Excel spreadsheet

34. End of Part 1. Introduction

35. Activating the "Programmer" tab

36. Activating the "Programmer" tab