Disable workbook X, use userform exit button

[mwc0914]

I have a button on my userform that performs the following

Private Sub btn_exit_Click()
ThisWorkbook.Close True
Application.Quit
End Sub

I want to prevent the user from using the workbook X to close the workbook and force them to use the button.
Everything I have found prevents the X from closing, but then the userform button does not allow closing either.

I want the button to continue to save, close and exit Excel.

 

[Fluff]

Try

Sub btn_exit_Click()

    Unload Me
    ThisWorkbook.Close True


End Sub

Private Sub UserForm_QueryClose(Cancel As Integer, CloseMode As Integer)
    
    If CloseMode = vbFormControlMenu Then
    Cancel = True
         MsgBox "Please use the ""Close"" button.", vbCritical, "Illegal Exit"
    End If

End Sub