Thanks for the ideas.
To Simon Stoll:
Overlaying the toggle button with another element is functional. I already used this in VC4 (hotspot), in mappView I used a transparent image and the click event. It works both when clicking and when changing a variable from the PLC.
To Marcel Voigt:
Thank you for the useful ideas. But unfortunately this solution does not reflect the change of the variable in an event other than clicking on a specific button. The given variable can be changed by the program for example…
To both:
Thank you for your time and idea 