H1 starting a Business can H4 spouse work there

[emmy]

I wonder if anyone can help with this.

Can my spouse on H1 open a business, and if so can I the H4 spouse work there without drawing a salary?
Or how else can we as a family set up a business whilst on H1 and H4

 

[GCFiler]

But, what about volunteer work, we can volunteer to work without salary, can't this case be considered like that.