VBA – How to auto fit row height of merged cells in Excel

How to auto fit row height of merged cells in Excel? (extendoffice.com)

Option Explicit
Public Sub AutoFitAll()
  Call AutoFitMergedCells(Range("a1:b2"))
   Call AutoFitMergedCells(Range("c4:d6"))
    Call AutoFitMergedCells(Range("e1:e3"))
End Sub
Public Sub AutoFitMergedCells(oRange As Range)
  Dim tHeight As Integer
  Dim iPtr As Integer
  Dim oldWidth As Single
  Dim oldZZWidth As Single
  Dim newWidth As Single
  Dim newHeight As Single
  With Sheets("Sheet4")
    oldWidth = 0
    For iPtr = 1 To oRange.Columns.Count
      oldWidth = oldWidth + .Cells(1, oRange.Column + iPtr - 1).ColumnWidth
    Next iPtr
    oldWidth = .Cells(1, oRange.Column).ColumnWidth + .Cells(1, oRange.Column + 1).ColumnWidth
    oRange.MergeCells = False
    newWidth = Len(.Cells(oRange.Row, oRange.Column).Value)
    oldZZWidth = .Range("ZZ1").ColumnWidth
    .Range("ZZ1") = Left(.Cells(oRange.Row, oRange.Column).Value, newWidth)
    .Range("ZZ1").WrapText = True
    .Columns("ZZ").ColumnWidth = oldWidth
    .Rows("1").EntireRow.AutoFit
    newHeight = .Rows("1").RowHeight / oRange.Rows.Count
    .Rows(CStr(oRange.Row) & ":" & CStr(oRange.Row + oRange.Rows.Count - 1)).RowHeight = newHeight
    oRange.MergeCells = True
    oRange.WrapText = True
    .Range("ZZ1").ClearContents
    .Range("ZZ1").ColumnWidth = oldZZWidth
  End With
End Sub