This document discusses Excel macros level 1 and covers several topics: - Built-in VBA functions and statements including MsgBox, InputBox, string functions, and error handling functions - Parameters for common functions like MsgBox, InputBox, and units conversion functions - Syntax examples for functions like IIf, Switch, and error handling statements like On Error Resume Next - Activities that instruct students to practice using various functions in their own macros.

1. Excel Macros Level 1 Built-in Functions and Statements

2. Built-in Functions VBA has large number built-in functions and statements Some are shown in Table 7-1 (p. 78) and Table 7-2 (p. 80) 4/29/2010 M. Campbell - 2010 2 p. 78

3. Procedure Template SubChangeFormat(FontName [, FontSize]) Parameters listed in italics Optional parameters listed in [square brackets] Type declarations will be listed separately 4/29/2010 M. Campbell - 2010 3 p. 78

4. MsgBox MsgBox(prompt [, buttons] [, title]) prompt (String) Message to display in body buttons (Long) Sum of values to specify properties of message box See Table 7-2 for enum of argument values title (String) Message to display in title bar 4/29/2010 M. Campbell - 2010 4 p. 78

5. MsgBox MsgBox function returns number indicating which button pressed Defined as VbMsgBoxResult enumerator See Table 7-3 for return values 4/29/2010 M. Campbell - 2010 5 p. 78

6. Activities In the Unit 7 Activities complete: Activity 1: MsgBox Procedure 4/29/2010 M. Campbell - 2010 6

7. InputBox InputBox(prompt[, title] [, default]) prompt (String) Message to display title (String) Message to display in title bar default (String) Default value for the text box 4/29/2010 M. Campbell - 2010 7 p. 81

8. InputBox Returns the string the user enters in text box title (String) Message to display in title bar default (String) Default value for the text box 4/29/2010 M. Campbell - 2010 8 p. 81

9. Activities In the Unit 7 Activities complete: Activity 2: InputBox Subroutine 4/29/2010 M. Campbell - 2010 9

10. VBA String Functions Please review pages 82-84 especially: Len UCase and LCase Left, Right, and Mid Str and Val Trim, LTrim, and RTrim 4/29/2010 M. Campbell - 2010 10 p. 82

11. Activities In the Unit 7 Activities complete: Activity 3: Phone Number Processing 4/29/2010 M. Campbell - 2010 11

12. The Is Functions IsDate Returns true if variable is a date IsEmpty Returns true if variable is empty IsNull Returns true if variable is Null IsNumeric Returns true if variable is a numeric type 4/29/2010 M. Campbell - 2010 12 p. 85

13. Immediate If Function IIf(Expression, TruePart, FalsePart) If Expression is True returns TruePart If Expression is False returns FalsePart Always evaluates both parts Can lead to errors if one part should not be evaluated 4/29/2010 M. Campbell - 2010 13 p. 85

14. Switch Function Switch(expr1, value1, expr2, value2, _ … , exprn, valuen) When it finds an expression that matches it returns the corresponding value If no match is made returns Null 4/29/2010 M. Campbell - 2010 14 p. 86

15. Dim number As Variant Dim check As Integer number = Switch(check = 1, "one", _ check = 2, "two", _ check = 3, "three") If Not IsNull(number) Then Debug.Print(number) Else Debug.Print("Unrecognized number") End If 4/29/2010 M. Campbell - 2010 15

16. Units Conversion InchesToPoints(inchValue) PointsToInches(pointValue) Many Excel functions take values in points May prefer to work in inches 72 points in an inch 4/29/2010 M. Campbell - 2010 16 p. 87

17. Handling Errors VBA has methods to handle run-time errors Error handling is vital in applications meant for public release 4/29/2010 M. Campbell - 2010 17 p. 88

18. On Error Goto On Error GotoLabel If a run-time error occurs VBA will goto the code following the label 4/29/2010 M. Campbell - 2010 18 p. 88

19. On Error Resume Next On Error Resume Next VBA will continue executing code immediately following line that caused error 4/29/2010 M. Campbell - 2010 19 p. 90

20. Resume Statement Resume Resume with line that caused error Good if your code corrected the error Resume Next Resume with the line after the one that caused error Resume label Resume with code at line labelled label 4/29/2010 M. Campbell - 2010 20 p. 91