Hi Cezara,
Thank you for writing.
Besides the
UpdateVisualStyles method, you will also need to override the
OnIsSelectedChanged in the custom shape`s class:
Alternatively, to the approach above you can set the
Visibility property of the connectors to
Visible and subscribe them to the
RadPropertyChanging event and cancel it. This can happen in your form:
I hope this helps. Should you have further questions please do not hesitate to write back.
Regards,
Hristo
Progress Telerik