A method of determining an operating state of a form-locking shift element of a transmission apparatus that, at least for changing one operating state between a disengaged operating state and an engaged operating state, is pressurized with an actuating pressure by a pressure-conducting region of the transmission apparatus. The pressure of the pressure-conducting region is monitored. Depending on the progression of the pressure of the pressure-conducting region, while pressurizing the form-locking shift element with the actuating pressure for changing the operating state, checking whether the form-locking shift element has the requested operating state.