Hello John,
The error is corrected.
I made many tests but I had forgottent this test for children windows.
Many functions are common to Parents and Children, if it is ok for parents that is ok for children.
Yes, but it must be initialized correctly!
Thank You very much.
I join a version that I hope will have less bugs.
I don't say no bugs because we don't have to be sure at 100% it is impossible.
Even if "Nothing is impossible" for Frenchies, be modest.
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Update 2021/5/5
The last version did not save the RDI register in two functions.
Use of SSE registers to avoid LOCAL variables and for returning the result.