Lock Entire Row Based On Date - vba

Question

I have Cell A1 with Month mentioned. I am trying to compare date in A2:last cell and wherever date > A1, I want the row to be unlocked, otherwise locked. The below code doesn't work"
Sub Lockrow()
Dim DestSh As Worksheet
Dim lastrow As Long
Dim i As Integer
Set DestSh = Sheets("Consultant & Volunteer")
With DestSh
'finds the last row with data on A column
lastrow = .Range("A" & .Rows.Count).End(xlUp).Row
'parse all rows
For i = 6 To lastrow
'if your conditions are met
If Month(.Cells(i, 26)) > Month(.Cells(1, 1)) Then
.Range("A" & i).EntireRow.Cells.Locked = True 'lock the row
End If
Next i
End With
End Sub

Answer 1

This can be done simply with below, but you have to be careful that Year doesn't change... Also the lastrow should be on Column Z.
Also, if the worksheet isn't Protected, there is no effect.
Option Explicit
Sub Lockrow()
Dim DestSh As Worksheet
Dim lastrow As Long
Dim i As Long ' Integer
Set DestSh = Sheets("Consultant & Volunteer")
With DestSh
'finds the last row with data on A column
lastrow = .Range("Z" & .Rows.Count).End(xlUp).Row ' <-- EDIT
'parse all rows
For i = 6 To lastrow
'if your conditions are met
.Rows(i).Locked = Not (Month(.Cells(i, "Z")) > Month(.Range("A1")))
' If Month(.Cells(i, 26)) > Month(.Cells(1, 1)) Then
' .Range("A" & i).EntireRow.Cells.Locked = True 'lock the row
' End If
Next i
.Protect UserInterfaceOnly:=True
End With
Set DestSh = Nothing
End Sub

Answer 2

Alternative to loop.
Dim r As Range, DestSh As Worksheet, lastrow As Long
Set DestSh = Sheets("Consultant & Volunteer")
With DestSh
lastrow = .Range("A" & .Rows.Count).End(xlUp).Row
Set r = .Range("A1:A" & lastrow)
r.EntireRow.Locked = False
r.AutoFilter 1, ">" & .Range("A1").Value2
r.SpecialCells(xlCellTypeVisible).EntireRow.Locked = True
.AutoFilterMode = False
.Protect UserInterfaceOnly:=True
End With