Macro Lesson

8/2/2019 Macro Lesson

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#1CS 105 Fall 2006

Macros:

Sub Procedures You Record

What is a macro?

What is WithEnd With?

What is SubEnd Sub?

Relative vs. Absolute


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#2CS 105 Fall 2006

Macro Statements

A Macro always beginsa Sub statement

A Macro ends with anEnd Sub statement


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#3CS 105 Fall 2006

A Macro

To performmultipleactions onthe same

objectMacros use

With

End With


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#4CS 105 Fall 2006

Select and Dothe pattern

Note how first the Macro selects theobject, then executes the code


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#5CS 105 Fall 2006

More about Macros

Statements are color coded

Step Into command helps you debug amacro

Opening a file with a macro will prompt aquestion about viruses


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#6CS 105 Fall 2006

Record Macro

Comments begin with anapostrophe ()

Comments help the programmer,

others to read code


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#7CS 105 Fall 2006

Calling Macros

You can use macros easily because

they are on a Module sheet, that

makes them available to everything, so allyou do is write the macro name


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#8CS 105 Fall 2006

Finding the Stop Recording button!

We lost our little macro recorder button

If you lose yours, go toView/Toolbars/Stop Recording, and it will

appear on your spreadsheet or on atoolbar.


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#9CS 105 Fall 2006

Cell References in Macros

Absolute references

When we specify exactly what cells areaffected

Absolute cell address are constant


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#10CS 105 Fall 2006

An absolute Macro

Range selects the starting or activecell/cellsthe references below areabsolutewhenever the Macro runs, theseexact cells are selected

First, thecell is

selected,

then

a number

is placed

in it


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#11CS 105 Fall 2006

ActiveCell.FormulaR1C1

R1C1 is a reference style (you can set thisunder Tools/Options/General)

Dont worry,we wont be

using this

in class. We want

yo

u to

kno

wwhere it came

from.


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#12CS 105 Fall 2006

ActiveCell.FormulaR1C1 = "Income"

All that you need to know is that for theactive cell, the content is "Income"

"FormulaR1C1" refers to the contents ofthe active cell

You find this notation in Macros that youcreate


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#13CS 105 Fall 2006

FormulaR1C1 vs. Value

Range("D5").Select

ActiveCell.FormulaR1C1 = "8"

Range("D5").Select

ActiveCell.Value = "8"

These two code fragments producethe same results.


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#14CS 105 Fall 2006

Range("D5").Select

ActiveCell.FormulaR1C1 = "=SUM(A1: A10)"

Range("D5").Select

ActiveCell.Value = "=SUM(A1: A10)"

These two code fragments do not produce the same

results. FormulaR1C1 requires different cell

addressing, "=SUM(R[-4]C[-3]:R[5]C[-3])"

Not used for a formula, though


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#15CS 105 Fall 2006

What if you want to vary the cells?


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#16CS 105 Fall 2006

Relative references

We dont always want the event to happen inthe same place

Cell addresses change

Visual Basic uses Offset to indicate spaceaway from active cell


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#17CS 105 Fall 2006

Recording a Macrowith Relative References

Before you start recording your Macro, clickon the

RelativeReference

button


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#18CS 105 Fall 2006

Relative Cell References

ActiveCell.Offset(2, 0).Range("A1").Select

Means the cell two rows below the active cell, inthe same column


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#19CS 105 Fall 2006

ActiveCell.Offset(2, 0).Range("A1").Select

What does

ActiveCell.Offset(2, 0).Range("A1").Select mean?


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#20CS 105 Fall 2006

Range("A1").Select

This part of the code tells you how manycells have been selected.

ActiveCell.Offset(2, 0).Range("A1").Select means1 cell is selected

ActiveCell.Offset(2, 0).Range("A1:C1").Selectmeans 3 cells in a row have been selected


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#21CS 105 Fall 2006

Activate or Select?

Range("B3").Select

Selection.Interior.ColorIndex = 6

Range("B3").Activate

Selection.Interior.ColorIndex = 6

Both code fragments have the same result


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#22CS 105 Fall 2006

This Relative Macro Causes a Crash


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#23CS 105 Fall 2006

Run it line-by-line to find bug

Code runs OK until it reaches

the line under the highlighted

line. You can turn your

attention to the problem lineof code!


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#24CS 105 Fall 2006

To Summarize

What is a macro?

What is WithEnd With?

What is SubEnd Sub?

Relative vs. Absolute

Macro Lesson

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