Visual Basic Macro Examples for Working with Arrays

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To Fill an Array, and Then Copy It to a Worksheet

1. Open a new workbook and insert a Visual Basic module sheet.
2. Type the following code on the module sheet.

         Sub Sheet_Fill_Array()
            Dim myarray As Variant
            myarray = Array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
            Range("a1:a10").Value = Application.Transpose(myarray)
         End Sub
   					

3. Select Sheet1.
4. On the Tools menu, Click Macro.
5. In the Macro dialog box, click Sheet_Fill_Array, and then click Run.

To Take Values from a Worksheet and Fill the array

1. Type values on Sheet1 in cells a1:a10.
2. On a Visual Basic module sheet, type the following code:

         Sub from_sheet_make_array()
            Dim thisarray As Variant
            thisarray = Range("a1:a10").Value
   
            counter = 1                'looping structure to look at array
            While counter <= UBound(thisarray)
               MsgBox thisarray(counter, 1)
               counter = counter + 1
            Wend
         End Sub
   					

3. Select Sheet1.
4. On the Tools menu, click Macro.
5. In the Macro dialog box, click from_sheet_make_array, and then click Run.

To Pass and Receive an Array

1. On a module sheet, type the following code:

         Sub pass_array()
            Dim thisarray As Variant
            thisarray = Selection.Value
            receive_array (thisarray)
         End Sub
   
         Sub receive_array(thisarray)
            counter = 1
            While counter <= UBound(thisarray)
               MsgBox thisarray(counter, 1)
               counter = counter + 1
            Wend
         End Sub
   					

2. Select Sheet1, and highlight the range A1:A10.
3. On the Tools menu, click Macro.
4. In the Macro dialog box, click pass_array, and then click Run.

To Compare Two Arrays

1. Create two named ranges on Sheet1. Name one range1 and the other range2.
   
   For example, highlight the cell range A1:A10 and name it range1; highlight the cell range B1:B10 and name it range2.
2. Type the following code on the module sheet.

         Sub compare_two_array()
            Dim thisarray As Variant
            Dim thatarray As Variant
   
            thisarray = Range("range1").Value
            thatarray = Range("range2").Value
            counter = 1
            While counter <= UBound(thisarray)
               x = thisarray(counter, 1)
               y = thatarray(counter, 1)
               If x = y Then
                  MsgBox "yes"
               Else MsgBox "nope"
               End If
               counter = counter + 1
            Wend
         End Sub
   					

3. Select Sheet2.
4. On the Tools menu, click Macro.
5. In the Macro dialog box, click compare_two_array, and then click Run.
   
   You will see one message box for every comparison.

To Fill an Array

1. Type the following code on a module sheet:

         Function array_fill()
            array_fill = Application.Transpose(Array(1, 2, 3))
         End Function
   					

2. Highlight the range A1:A3 on a Sheet2 and type =array_fill(), and then press CTRL+SHIFT+ENTER. In Microsoft Excel for the Macintosh, press COMMAND+RETURN.

To Fill an Array and Add up the Array

1. On a module sheet, type the following code:

         Function test(x As Object) As Integer
            For Each mycell In x
               test = test + mycell.Value
            Next
         End Function
   					

2. Select Sheet1 and highlight range A1:A10.
3. In cell A12 type =test(cell_range), and then press CTRL+SHIFT+ENTER. In Microsoft Excel for the Macintosh, press COMMAND+RETURN.

To Fill a Dynamic Array

1. On a module sheet, type the following code:

         Sub fill_array()
   
            Dim thisarray As Variant
            number_of_elements = 3     'number of elements in the array
   
            'must redim below to set size
            ReDim thisarray(1 To number_of_elements) As Integer
            'resizes this size of the array
            counter = 1
            fillmeup = 7
            For counter = 1 To number_of_elements
               thisarray(counter) = fillmeup
            Next counter
   
            counter = 1         'this loop shows what was filled in
            While counter <= UBound(thisarray)
               MsgBox thisarray(counter)
               counter = counter + 1
            Wend
   
         End Sub
   					

2. On the Tools menu, click Macro.
3. In the Macro dialog box, click fill_array, and then click Run.

NOTE: Changing the variable "number_of_elements" will determine the size of the array.