I have an Excel charting program written in Excel 95. The program is over 15 years old. The program has an xl5 extension. The source files for the program are wk1 extension because they are old Lotus 1-2-3 files. I need this charting program updated to Excel 2007, which is the current version of Excel that I am running. Also, I want the program to run exactly as before, except the source files will be xls instead of wk1. The file formats of the source files will be exactly the same except they will be xlx instead of xl1. Even the naming convention for the files will be the same. For example, a source file named [login to view URL] in the old program will be named [login to view URL] in the new program and have the same data format. I am including a PKZIP file that contains the original xl5 program and sample source (wk1) files.