HELP NEEDED: How to enabled macro with locked cells

Dear Excel Expert,

Is there any way where I can used my macro-enabled sheet while locking certain cells in my excel sheet?

Attached is part of my macro VBA code, thanks for your advise!

Sub Apr()
'
' Apr Macro
'

'
    ActiveSheet.Range("$B$5:$K$668").AutoFilter Field:=2, Criteria1:="April"
End Sub
Sub Mar()
'
' Mar Macro
'

'
    ActiveSheet.Range("$B$5:$K$668").AutoFilter Field:=2, Criteria1:="Mar"
    ActiveWindow.SmallScroll Down:=-108
    Range("C219").Select
End Sub
Sub Feb()
'
' Feb Macro
'

'
    ActiveSheet.Range("$B$5:$K$668").AutoFilter Field:=2, Criteria1:="Feb"
    ActiveWindow.SmallScroll Down:=-30
End Sub
Sub Jan()
'
' Jan Macro
'

'
    ActiveSheet.Range("$B$5:$K$668").AutoFilter Field:=2, Criteria1:="Jan"
    ActiveWindow.SmallScroll Down:=-18
End Sub