Gets a value indicating whether the checked or check_state values and the toggle_button's appearance are automatically changed when the toggle_button is clicked.
Returns
true if the checked value or check_state value and the appearance of the control are automatically changed on the click event; otherwise, false. The default value is true.
Remarks
If auto_check is set to false, you will need to add code to update the checked or check_state values in the click event handler.