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I have a built *.exe which I wrote myself two years ago but for which I have since lost the source VI. Said original VI was small so that I could write it anew, but am hoping for a lazier way. I'd like (if that's possible) to just un-build that foo.exe so as to get the original foo.vi if that is possible. I was thinking to put it in the public domain once I do. How I losts the VI is that between then and now I'd got a PC upgrade at work and must have neglected to copy that over (it not being an official work project). What the little program does is only some math. I have attached it as a ZIP. It's a conveninece util for doing trig on bit map pictures. Say you know the size of one item in the picture, You enter that. You also enter the X,Y pairs, end-to-end for that item. Then to know the size of any other item in the same pic (only approximate because of ignoring the camera's parallax) you enter another set of X,Y pairs and violla, it does the trig. Very handy for guestimating proportions so as to create 3D models from photographs of real-world objects. I didn't have LabVIEW on my home PC so I built this up at work, but in a directory not where I keep my work-related LabVIEW projects. And hence I forgot to copy it over when I got the new PC. Virtual Calipers.zip