I'd like to share this little macro with you all. It's for use with a structure input, published with 'xy' in front of it, which will show up as a 2d point picker interface element inside VDMX.
The macro takes care of splitting the structure and scaling the values to the correct qc dimensions. It's saved me a lot of time, and I hope it will for you as well
More info and download here: http://www.hybridvisuals.nl/downloads/vdmx-mouse-macro/
Joris