>>261
WMIか、NTAPIのNtQueryInformationProcessを使う。

https://stackoverflow.com/questions/71237606/get-full-command-line-from-process

https://github.com/reactos/reactos/blob/b671b1cf8f7c3dce718d81f9067e07c66f878498/base/applications/taskmgr/perfdata.c#L585