COMMAND$ and wildcards on files

[zaadstra]

Thanks for the tip, I will look into your API archive from Github.  I just can't get started on those Windows calls.
Back in the days I owned an Acorn RiscPC, and knew all about the OS and calls.  Syscalls were easy, both from (BBC) Basic and (ARM) Assembler. Those were the days.... But I had good documentation then, and I have to find the boat for a good start on Win syscalls.
Any links or docs on this would be appreciated!

For the stamp tool I want to create (for someone else): the behaviour of selecting files and using paths and wildcards has to feel 'natural'.