I'm using the following code to update a sheet2 based on values in
first column of sheet1.
I want to modify to cycle across two more sheets against column 2 &
column 3 of sheet1

sheet1----column1-------for------sheet2

sheet1----column2-------for------sheet3
sheet1----column3-------for------sheet4

-------------------------------

Dim vArr As Variant
Dim rCell As Range
Dim rDelete As Range
Dim nLow As Long
Dim nHigh As Long
Dim i As Long
Dim sTest As String

Sub Update_List()

With Sheets("Sheet1")
vArr = .Range(.Cells(1, 1), _
.Cells(.Rows.Count, 1).End(xlUp)).Value
End With
nLow = LBound(vArr, 1)
nHigh = UBound(vArr, 1)
With Sheets("Sheet2")
For Each rCell In .Range(.Cells(1, 1), _
.Cells(.Rows.Count, 1).End(xlUp))
sTest = rCell.Text
For i = nLow To nHigh
If sTest = vArr(i, 1) Then
If rDelete Is Nothing Then
Set rDelete = rCell
Else
Set rDelete = Union(rDelete, rCell)
End If
End If
Next i
Next rCell
If Not rDelete Is Nothing Then rDelete.EntireRow.Delete
End With
End Sub