What alterantives a company can do to raise money for equity capital from a...

[tehsiang c]

...stock secondary market? 1. I don't mean using any borrowing method.
2. Does a company can buy back its shares from the market as treasury stock but not void/cancel them and resell them when it needs equity capital?
3. I always thought the stock secondary market only benefits the investors but no money raise real effects toward companies after they had issued their shares on the market unless the above-mentioned condition is permitted.