HomeMatic HM-Sec-Win, How to lock Window

I have looked through the channels of the thing associated with my HM-Sec-Win device.
I cannot find the channel for locking/unlocking the window.

In the HomeMatic on the web UI, the function is executed by pressing the button:

Or inside the HomeMatic program there are actions which be assigned:

Does anybody use this device and what channel is it?