Iterations with a Vlookup UDF

Hey all,

I have done a fair share of vba programming and am familiar with a lot of the capabilites but am very much a novice in certain areas of programming. One of them would be interations with for loops. I have many sets of data which I am analyzing via various macros that perform different functions. Currently where I need help is with integrating a UDF to find all matches in a data range using Vlookup. This search is based off frame number and reports all of the x-coordinates found in the frame number. However, I'm almost positive to get this program to run dynamically in a macro it needs to be part of a for loop to detect and iterate through any number of frames a data set may contain. I've posted an example workbook to make things a little easier to visualize. As always feel free to ask questions and also any suggestions to reformat and clean up the UDF output would be greatly appreciated.