Hi Julien,
[quote user="Julien BIssonnette Lapierre"]via the following command[/quote]
I recommend to use Syntaxhlighlighter tool (yellow pencil icon) to insert a code to your post. This tool, when the language is set correctly, ensures it will be displayed and colorize nicely, which makes you post much easier to read.
[quote user="Julien BIssonnette Lapierre"]But I'm still trying to find how to launch a specific PowerDraft macro[/quote]
The problem is that PowerDraft 7 is really old piece of software (I guess about 19 years), so it's not compatible with technologies used today (like COM Automation API in VBA etc.) and tricks and workarounds are long forgotten.
Today, as an alternative to mentioned VBA COM access, it's possible to use e.g. -S<startup_file> parameter, but I am not sure if similar functionality was supported in version 7.
Another way can be to use configuration variable(s) to define what macro should be started when a design file is opened. For more information how to do that, see this AskInga article.
With regards,
Jan