Pixel Positions

[MrTVideo]

I am trying to make a moving path of a video over a base one. At present I am typing the pixel positions using conditionalread. It works ok but it would be nice if I could mouseclick on the base video in Virtualdubmod and have the pixel positions written to a text file.
Any Idea's

Thanks Terry :)

[MrTVideo]

Ok I now have a program I wrote that writes pixel positions to a text file but it has to be in focus. going to try the same program in script form using avisynth syntax.
I appreciate any surgestions it will be appreciated. I will acomplish it myself eventually but then who will know how I did it