This is a toggleButtonto switch Chart.ProtectFormatting on/off.

How do you build it to always “show” the active charts’ state?

If Not TypeName(Selection) = "ChartArea" Then Exit Sub does not work.

' -- XML

<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui" 
 onLoad="LoadRibbon">
  <ribbon>
    <tabs>
      <tab id="Tabv3.1" label="TOOLS" insertAfterMso="TabHome">                  
        <group id="Group6" label="Protect Formatting">
          <toggleButton id="ToggleButton4" 
                        label="ChtLock" 
                        imageMso="Lock" 
                        size="large"
                        getPressed="ToggleButton4_Startup" 
                        onAction="ToggleButton4_OnAction"/>       
        </group>           
      </tab>
    </tabs>
  </ribbon>
</customUI>


' -- Standard Module

Option Explicit
Public RibUI As IRibbonUI

Sub LoadRibbon(Ribbon As IRibbonUI)
Set RibUI = Ribbon
    RibUI.InvalidateControl "ToggleButton4"
End Sub

' ToggleButton 4 Startup
Sub ToggleButton4_Startup( _
   ByRef control As IRibbonControl, _
   ByRef returnedVal)
   'If Not TypeName(Selection) = "ChartArea" Then Exit Sub
   returnedVal = (ActiveChart.ProtectFormatting) = True
End Sub

' ToggleButton 4 Click
Sub ToggleButton4_OnAction( _
   ByRef control As IRibbonControl, _
   ByRef pressed As Boolean)
   'If Not TypeName(Selection) = "ChartArea" Then Exit Sub
   Select Case pressed
      Case True
          ActiveChart.ProtectFormatting = True
      Case False
          ActiveChart.ProtectFormatting = False
   End Select
End Sub


' -- ThisWorkbook

Private Sub Workbook_SheetActivate(ByVal Sh As Object)
    RibUI.InvalidateControl "ToggleButton4"
End Sub

Private Sub Workbook_SheetSelectionChange(ByVal Sh As Object, ByVal Target As Range)
    RibUI.InvalidateControl "ToggleButton4"
End Sub