feat: add VBA example to modify PivotTables

Excel macro example for changing all PivotTables in the workbook to Tabular form, repeats labels and disables Subtotals.

Examples/VBA/ChangePivotTablesVBA.ps1

@@ -0,0 +1,62 @@
+<#
+Excel VBA macro which changes all PivotTables in the workbook to Tabular form, disables subtotals and repeats item labels.
+https://github.com/dfinke/ImportExcel/issues/1196#issuecomment-1156320581
+#>
+$ExcelFile = "$ENV:TEMP\test.xlsm"
+Remove-Item -Path $ExcelFile -ErrorAction SilentlyContinue
+
+$Macro = @"
+Private Sub Workbook_Open()
+'
+' ChangePivotTables Macro
+' Runs when the Excel workbook is opened.
+'
+' Changes all PivotTables in the workbook to Tabular form, repeats labels
+' and disables Subtotals.
+'
+    ' Declare variables
+    Dim Ws As Worksheet
+    Dim Pt As PivotTable
+    Dim Pf As PivotField
+    ' Disable screen updates
+    Application.ScreenUpdating = False
+    ' Continue even if an error occurs
+    On Error Resume Next
+    For Each Ws In ActiveWorkbook.Worksheets
+        For Each Pt In Ws.PivotTables
+            Pt.RowAxisLayout xlTabularRow
+            Pt.RepeatAllLabels xlRepeatLabels
+            For Each Pf In Pt.PivotFields
+                Pf.Subtotals(1) = False
+            Next
+        Next
+    Next
+    Application.ScreenUpdating = True
+End Sub
+"@
+
+$Data = ConvertFrom-Csv -InputObject @"
+Region,Item,TotalSold
+West,screwdriver,98
+West,kiwi,19
+North,kiwi,47
+West,screws,48
+West,avocado,52
+East,avocado,40
+South,drill,61
+North,orange,92
+South,drill,29
+South,saw,36
+"@
+
+$ExcelPackage = $Data | Export-Excel $ExcelFile -TableName "Sales" -WorksheetName "Sales" -AutoSize -PassThru
+# Add Macro to the ThisWorkbook module
+$ExcelPackage.Workbook.CreateVBAProject()
+$VBAThisWorkbookModule = $ExcelPackage.Workbook.VbaProject.Modules | Where-Object -FilterScript { $_.Name -eq "ThisWorkbook" }
+$VBAThisWorkbookModule.Code = $Macro
+
+# Create PivotTable example
+Add-PivotTable -PivotTableName "SalesPivot" -Address $ExcelPackage.Sales.Cells["E1"] -SourceWorksheet $ExcelPackage.Sales `
+    -SourceRange $ExcelPackage.Sales.Tables[0].Address -PivotRows "Region", "Item" -PivotData @{ "TotalSold" = "Sum" }
+
+Close-ExcelPackage -ExcelPackage $ExcelPackage