It will automatically click the button you want.
Example
Running this code will allow you to click the number 5 in the calculator shown below.
This is shown in the calculator.
plugin command("Apps Automation.dll", "apps automation parent", "Process:Calculator|Title:Calculator|Class:Windows.UI.Core.CoreWindow", "True") {
plugin command("Apps Automation.dll", "apps automation button", "/Window|Group[1]|Group:NumberPad:Number pad|Button:num5Button:Five")
}
