How to get H4 visa ?

[vikramhd]

Hi,

I have got my H1B visa from Chennai US Consulate, India. I want to apply for H4 (dependent Visa) for my wife and son (2 months old). Please let me know if you have any information on –

How to get web appointment
Documents required
Any web site which gives details on H4
And any other relevant information.

Thanks in advance.

Vikram H D