Option Explicit

Sub FindAll()

'PURPOSE: Find all cells containing a specified values
'SOURCE: www.TheSpreadsheetGuru.com

Dim fnd As String, FirstFound As String
Dim FoundCell As Range, rng As Range
Dim myRange As Range, LastCell As Range
Dim TextBox1 As TextBox

'What value do you want to find (must be in string form)?
  fnd = Sheets("Sheet1").TextBox1.Value     '<--- specify which sheet here

Set myRange = ActiveSheet.UsedRange
Set LastCell = myRange.Cells(myRange.Cells.Count)
Set FoundCell = myRange.Find(what:=fnd, after:=LastCell)

'Test to see if anything was found
  If Not FoundCell Is Nothing Then
    FirstFound = FoundCell.Address
  Else
    GoTo NothingFound
  End If

Set rng = FoundCell

'Loop until cycled through all unique finds
  Do Until FoundCell Is Nothing
    'Find next cell with fnd value
      Set FoundCell = myRange.FindNext(after:=FoundCell)
    
    'Add found cell to rng range variable
      Set rng = Union(rng, FoundCell)
    
    'Test to see if cycled through to first found cell
      If FoundCell.Address = FirstFound Then Exit Do
      
  Loop

'Select Cells Containing Find Value
  rng.Select
  
Exit Sub

'Error Handler
NothingFound:
  MsgBox "No values were found in this worksheet"

End Sub

Sub HighlightFindValues()

'PURPOSE: Highlight all cells containing a specified values
'SOURCE: www.TheSpreadsheetGuru.com

Dim fnd As String, FirstFound As String
Dim FoundCell As Range, rng As Range
Dim myRange As Range, LastCell As Range
Dim TextBox1 As TextBox

'What value do you want to find (must be in string form)?
  fnd = Sheets("Sheet1").TextBox1.Value

Set myRange = ActiveSheet.UsedRange
Set LastCell = myRange.Cells(myRange.Cells.Count)
Set FoundCell = myRange.Find(what:=fnd, after:=LastCell)

'Test to see if anything was found
  If Not FoundCell Is Nothing Then
    FirstFound = FoundCell.Address
  Else
    GoTo NothingFound
  End If

Set rng = FoundCell

'Loop until cycled through all unique finds
  Do Until FoundCell Is Nothing
    'Find next cell with fnd value
      Set FoundCell = myRange.FindNext(after:=FoundCell)
    
    'Add found cell to rng range variable
      Set rng = Union(rng, FoundCell)
    
    'Test to see if cycled through to first found cell
      If FoundCell.Address = FirstFound Then Exit Do
      
  Loop

'Highlight Found cells yellow
  rng.Interior.Color = RGB(255, 255, 0)
  
Exit Sub

'Error Handler
NothingFound:
  MsgBox "No values were found in this worksheet"

End Sub