Trigger macro via batch file

Good morning community,
I am developing an application and I am evaluating the possibility of triggering a certain synapse macro via batch file or any means other than by physically typing the keyboard.
Has anyone done something like this?
I tried, for example, to add a macro to the "A" key on the keyboard and enter the following code in the CMD:

powershell -c "$wshell = New-Object -ComObject wscript.shell; $wshell.SendKeys('a')

However, it does not trigger the macro, it just types the "A" key, ignoring the existence of the macro.
Would anyone have a better idea of how to do this?
Thanks