I have installed 4.2.3 unitypackage and need to make virtual button but IVirtualButtonEventHandler don't exist! What should I do?
Why 4.2.3 don't have IVirtualButtonEventHandler?
Also make sure to add this line at the top of your C# scripts:
the Vuforia interfaces (such as the IVirtualButtonEventHandler) are defined in the Vuforia namespace.
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