Sub hide_unhide()
ActiveSheet.Unprotect Password:="justme"
Rows("1:23").Hidden = True
ActiveSheet.Protect Password:="justme"
End Sub
Or possibly toggle
Sub toggle_hide_unhide()
ActiveSheet.Unprotect Password:="justme"
Rows("1:23").Hidden = Not Rows("1:23").Hidden
ActiveSheet.Protect Password:="justme"
End Sub