>I am using the sting to file and file to string functions in VFP 6.0 but I don't see my results. I have 2 pdf files which I want to create into one big file. I use File to str to store the first to a variable. Then I use String to file specifing additive to take the first file in the variable and add to my second file. The file size increases accordingly and opens fine. However the newly added pages do not show? Does anyone know a fix or why?
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>I have several pdf files I would like to combine using automation?

Don't think you can get there from here. Concatenating PDF files will not add the other pages, it is in some kind of proprietary format.