When using Chrome on my Surface Pro, I can zoom web pages in and out by using the zoom gesture on my touchscreen or on the touchpad.
I'm looking into adding similar zoom functionality to my Delphi application. I figured out how to respond to touchscreen events (either using Delphi's "interactive gestures" support and OnGesture events, or using Windows' WM_GESTURENOTIFY and WM_GESTURE events), but touchpad events don't seem to generate any gesture events?
What interface or API should I be using to see touchpad gestures?
