how to add unsupported Patterns to an AutomationElement? do AutomationPeers change the application under test?

Question

the following custom control ToggleButton is not capable of InvokePattern.

<ToggleButton   Click="click_event" 
... />

What can I do to execute the ToggleButton's click-event over some UIA-Pattern??

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This link provides information about AutomationPeer & custom controls. But it seems like I need to change the application under test (AUT) to use this customized AutomationPeer?! Guideline if you are allowed to change the AUT

Answer 1

Toggle buttons don't support InvokePattern, but they do support TogglePattern. You shouldn't need to dive into the automation peers at all.