Thanks, that's exactly what I was looking for. The reason I ask for multiple files processing : I have a lot of single novel files, and converting each of them with single run of app isn't the most curious thing which can be made

Actually, you r app inspired me to write my own. Apart from your features ,I'm gonna add some default rtf formating (I found that the best format for my eyes is : font 16p and gaps between lines : 18p , 0p marigins). With such app, I'll be able to transform plain ANSII text files( which is 90% of my ebook collection) to proper rtf files in just single run. I'll share ,when it's finished.