Hi rhadiem, MoI uses new touch events in Windows 8 but from what I understand those are usually generated by a touch screen and not usually with a separate opaque (meaning not a display screen also) drawing tablet.

Most likely the tablet is not generating the same kinds of events as a touch screen would and is instead probably emulating a scroll wheel with the zoom in and out gestures. Also the + and - overlay is probably something from this emulation layer that the tablet driver is providing.

I discovered this myself when I was trying to implement this stuff, I initially tried to use a logitech multitouch pad but I was surprised to find out that it did not generate any real touch messages like a touch screen does. I had to get an actual touch screen device instead.

There are some discussions on this about the Bamboo not fully supporting multitouch same as a touch screen on these links here:

http://gguuss.wordpress.com/2009/12/15/wacom-bamboo-pen-touch-review/

http://forum.wacom.eu/viewtopic.php?f=4&p=14876


Basically the bamboo does not generate true "WM_TOUCH" or "WM_POINTER" events and instead sends kind of higher level messages like scroll wheel messages to applications instead. In order to get the stuff that you're referring to working in MoI, MoI needs to receive actual touch events.

- Michael