Word - show/hide bookmark text based on checkbox

[adhoc]

Hi - apologies if I'm misunderstanding as I'm new to this but I am just wanting to show or hide bookmark text in a Word document based on a checkbox being ticked on or off.

I have tried:

Private Sub Document_Open()    ' This subroutine runs when the Word document is opened
    ' It ensures that the text linked to checkboxes is hidden by default
    HideTextBasedOnCheckbox
End Sub


Private Sub CheckBox1_Click()
    ' This subroutine is linked to the checkbox's click event
    HideTextBasedOnCheckbox
End Sub


Private Sub HideTextBasedOnCheckbox()
    ' This subroutine checks the state of the checkbox and shows/hides text accordingly
    Dim cb As CheckBox
    Set cb = ActiveDocument.FormFields("CheckBox1").CheckBox
    
    If cb.Value = True Then
        ' If the checkbox is ticked, show the text
        ActiveDocument.Bookmarks("TextToDisplay").Range.Font.Hidden = False
        MsgBox "The checkbox is ticked!", vbInformation
    Else
        ' If the checkbox is not ticked, hide the text
        ActiveDocument.Bookmarks("TextToDisplay").Range.Font.Hidden = True
    End If
End Sub

Is there something wrong with the above code?

Thanks
T