Help wiith a Virtual Button

I’m a beginner, i start to create an application with Vuforia SDK.
i have create a virtual button, now i need to configure this with a script. When i touch this button ( with my finger on the camera) , a 3d object appear in the application

How can i do ?

haven’t used virtual buttons, but tou could check out the sample app vuforia provides

https://developer.vuforia.com/resources/sample-apps/virtual-button-sample-app