B4J Question Printing an invoice with B4J

Hello,
I'm finishing programming a tool to control my stock, sells ect, and now i'm trying to print an invoice from my desk app,
I have seen Erel Post https://www.b4x.com/android/forum/threads/print-with-printhtml-tool.35492/#content but I want to creat a full pdf invoce file with table, head etc .. ,

I could not find how to do it,

Please any Help

Thanks