I wish to lock the cells in a particular sheet ("CMstr", see attachment) in which user has entered data and balance cells to be remained unlocked.

The cells should get locked when the user saves the workbook with a Warning Message (like - to check the data entered is correct/ cells will be locked after saving etc).

Some other conditions also need to be met as per sheet no "2". VB codes for these conditions are available for reference.

Can anybody help please?

Thanks in advance.

1) Take the code out of the CMstr sheet module.

2) Replace this macro in your ThisWorkbook module:

Code:

---

Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)
Dim myWS As Worksheet
Cancel = True

    For Each myWS In Worksheets
        If myWS.Range("t51").Value = "Check Culprit Code Allocation" Then
            MsgBox "Please check culprit code allocation on Sheet No." & myWS.Name
            Exit Sub
        End If
    Next myWS

    If SaveAsUI = True Then
        MsgBox "SaveAs not allowed.  Use Save."
        Exit Sub
    End If
   
    If MsgBox("Saving this workbook will lock the entries completed so far and you will no longer be able to edit them. Do you really want to save the workbook now?", vbYesNo) _
        = vbNo Then Exit Sub
       
    Call UpdateAndSaveSheet

End Sub

---

3) Add this to the bottom of the code in the ThisWorkbook module:

Code:

---

Private Sub UpdateAndSaveSheet()
Dim LastRow As Long, ws As Worksheet
Application.ScreenUpdating = False
Application.EnableEvents = False

For Each ws In Sheets(Array("CMstr"))  'extend this array to include all your sheets by name
    ws.Protect UserInterfaceOnly:=True
'    ws.Protect Password:="vinay", UserInterfaceOnly:=True
   
    LastRow = ws.Range("A" & ws.Rows.Count).End(xlUp).Row
    If LastRow < 3 Then GoTo FinishLine
   
    With ws.Range("A3:H" & LastRow)
        .Locked = True
        .Interior.ColorIndex = 37
    End With

Next ws

FinishLine:
    ThisWorkbook.Save
    Application.ScreenUpdating = True
    Application.EnableEvents = True
End Sub

---

Thank you JBeaucaire !