Punjabi: haigay

[musicgold]

Hi,

I was watching a Punjabi movie and I am a bit confused with the use word 'haigay'.

In one of the scene, a guy knocks on a door and says 'haigay', which probably means 'are you home?'.

But I have heard the word a few more times and got confused.

How is one supposed to use this word?

Thanks