VBA Word Expand Range with one line - excel

Question

First of all this is the first time I am creating a macro using VBA code. With some bits and pieces i found on the internet I tried to create the following. I am not a developer at all, I just have some basic knowledge from school. So my apologies if this is poor coding.
I am creating a macro in word which highlights text from a paragraph heading until the next heading with the same style. This is done based on a list of headings I import from Excel. You can find the code I have created below. The result with few input is perfect, so that's a good thing! The execution is very slow though (3 to 4h), which is probably related to the many selects I use. (I read only this is very often the cause of slow macros)
I tried to expand my Range with one line at the time using " Range.Expand Unit:=wdLine " but it's giving me errors every time. Therefore I use the moveDown selection method now which is doing the trick. Does anyone know a way I could use ranges here to speed up the process?
Many thanks in advance.
Sub Highlight_WordN()
Dim par As Paragraph
Dim par2 As Paragraph
Dim doc As Document
Dim oRng As Range
Dim Sty As Style
Dim intCurrentLine As Integer
Dim strFindArray() As String
Dim strIn As String
Dim strWorkBookName As String
Dim strNumberCells As String
Dim MessageFound As String
Dim MessageNotFound As String
Dim Flag As Boolean
Dim IsHeading As Boolean
Dim IsNothing As Boolean
'*****Set parameters for performance*****
Word.Application.ScreenUpdating = False
Word.Application.Options.CheckGrammarAsYouType = False
Word.Application.Options.CheckGrammarWithSpelling = False
Word.Application.Options.CheckSpellingAsYouType = False
Word.Application.Options.AnimateScreenMovements = False
Word.Application.Options.BackgroundSave = False
Word.Application.Options.CheckHangulEndings = False
Word.Application.Options.DisableFeaturesbyDefault = True
'*****Load data from excel*****
'List of headers to delete
Dim xlApp As Object
Dim xlBook As Object
strWorkBookName = "C:\Users\driesenn\OneDrive\OMAR\UPDATE\ToDelete.xlsx"
On Error Resume Next
Set xlApp = GetObject(, "Excel.Application")
If Err Then
Set xlApp = CreateObject("Excel.Application")
End If
On Error GoTo 0
Set xlBook = xlApp.Workbooks.Open(FileName:=strWorkBookName)
xlApp.Visible = False
ArrayLen = 0
ArrayLen = xlApp.ActiveSheet.Range("B1")
strNumberCells = "A1:A" & ArrayLen
strArray = xlApp.Transpose(xlApp.ActiveSheet.Range(strNumberCells))
ArrayLen = 0
ArrayLen = UBound(strArray) - LBound(strArray) + 1
Set xlBook = Nothing
xlApp.Quit
Set xlApp = Nothing
'*****Start evaluation process for headers*****
ArrayLen = UBound(strArray) - LBound(strArray) + 1
'Loop over all headers in the array
For i = 1 To ArrayLen
strFind = strArray(i)
'Evaluate every paragraph heading
For Each par In ActiveDocument.Paragraphs
If par.Style Like "Heading*" Then
Set Sty = par.Style
'Search for the header number in the heading
If InStr(par.Range.Text, strFind) = 1 Then
Set oRng = par.Range
oRng.Select
intCurrentLine = oRng.Information(wdFirstCharacterLineNumber)
Set oRng = Selection.Next(Unit:=wdLine, Count:=1)
'If the next line is not a header --> go on
IsHeading = False
If oRng.Style Like "Heading*" Then
IsHeading = True
End If
'Keep looping until the next heading of this type is found
Do While oRng.Style > Sty Or IsHeading = False
Selection.MoveDown Unit:=wdLine, Count:=1, Extend:=wdExtend
Set oRng = Selection.Next(Unit:=wdLine, Count:=1)
If oRng Is Nothing Then
Exit Do
End If
'If the next line is not a header --> go on
IsHeading = False
If oRng.Style Like "Heading*" Then
IsHeading = True
End If
Loop
Selection.Start = par.Range.Start
'If we are not at the end of the document selection ends with last line of current range.
If oRng Is Nothing Then
Else
Selection.End = oRng.Start
End If
'Set highlight
Selection.Range.HighlightColorIndex = wdYellow
End If
End If
Next
Next
End Sub

Answer 1

Firstly, it will assist you to become familiar with using help. Place your cursor in the keyword that you need help with and press F1. Had you done so for the Expand method you would have landed here. You will find the valid parameters for Unit are listed.
Secondly, paragraph styles are applied to paragraphs not lines. So you need to check the style of each paragraph and expand the range by one paragraph at a time. This will enable you to avoid selecting anything.

Answer 2

The following code shows a much easier way of highlighting the ranges associated with different heading levels, using Word's built-in '\HeadingLevel' bookmark:
Sub Demo()
Dim h As Long, c As Long, Rng As Range
For h = 1 To 9
With ActiveDocument.Range
With .Find
.ClearFormatting
.Replacement.ClearFormatting
.Text = ""
.Style = "Heading " & h
.Replacement.Text = ""
.Format = True
.Forward = True
.Execute
End With
Do While .Find.Found
Set Rng = .Paragraphs(1).Range
Set Rng = Rng.GoTo(What:=wdGoToBookmark, Name:="\HeadingLevel")
Select Case h
Case 1 To 4: c = h + 1
Case 5: c = h + 2
Case 6 To 8: c = h + 4
Case 9: c = h + 5
Case Else: c = 0
End Select
Rng.HighlightColorIndex = c
.Collapse wdCollapseEnd
If .Information(wdWithInTable) = True Then
If .End = .Cells(1).Range.End - 1 Then
.End = .Cells(1).Range.End
.Collapse wdCollapseEnd
If .Information(wdAtEndOfRowMarker) = True Then .End = .End + 1
End If
End If
If .End = ActiveDocument.Range.End Then Exit Do
.Collapse wdCollapseEnd
.Find.Execute
Loop
End With
Next
End Sub
Of course, as the above code loops through all 9 heading levels, what ends up with a given highlight depends on how many other lower-level headings (higher numbers) are nested within a given higher-level heading (lower numbers).