Marc,
I can tell you FWH is a very good tool for creating an invoicing package. I've been using it for 18 years now ( replacing my 17 years of Clipper code with it back in 1999 ). However my source is not available since it is the basis of my income ....
I will share that the fully integrate package I created, and continually update/enhance, is extensive and is done 100% in FWH.
Tim
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