Synthetic Instruction for the HP41 but typed into a Win11 PC

[knife31]

Hi everybody
I was wondering if you could write a program on a Windows 11 PC for the HP-41CV/CX/L etc.., that would include Synthetic Lines. I kind of know how to use the byte grabber but was wondering how on earth you would do it on a PC. Can you take the Xrom numbers of two functions and put together or something like that or is there a particular number as such that would represent the synthetic instruction. I was going to try my hand at inputting some programs into my DM41X, (work smarter not harder). I've been using HP's sense the 70's but there is so much info that I'm barely past the amateur stage. I want to say I read something in the PPC Journal a long time ago but not sure.
Randy