Unit 6: Functions and Subroutines - Part 2/2
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Unit 6: Functions and Subroutines - Part 2/2
- 1. Excel Macros Level 1 Functions and Subroutines
- 2. ByRef SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByRefiAs Integer) i = i + 1 End Sub M. Campbell - 2010 2 p. 73 This displays 6 as x had 1 added to it by AddOne
- 3. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 3 p. 73
- 4. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 4 p. 73 Initializes x to 5
- 5. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 5 p. 73 Displays 5
- 6. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 6 p. 73 Calls AddOne and sends value of x (in this case 5)
- 7. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 7 p. 73 AddOne is sent the value of x only, so i is set to 5
- 8. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 8 p. 73 1 is added to i to get 6 However, ProcedureA cannot see i
- 9. ByVal SubProcedureA() x = 5 MsgBox x CallAddOne(x) MsgBox x End Sub SubAddOne(ByValiAs Integer) i = i + 1 End Sub M. Campbell - 2010 9 p. 73 This displays 5 as x was not changed by AddOne
- 10. p. 75 ByRef ByVal Pass By Reference Allows the argument to be changed Takes less memory and time If not specified, VBA defaults to ByRef Pass By Value Prevents the argument from being changed Takes more memory and time 4/29/2010 M. Campbell - 2010 10
- 11. Exiting a Procedure To exit a function early: Exit Function To exit a subroutine early: Exit Sub 4/29/2010 M. Campbell - 2010 11 p. 76