Start here:
Immigration Through A Family Member
Your wife needs to petition on your behalf and file an Affidavit of Support:
Form I-130, Petition for Alien Relative
Form I-864, Affidavit of Support
..and you need to follow instructions here to petition for adjustment of status:
Application Procedures: Becoming a Permanent Resident While in the United States
Most importantly? Hire an Immigration attorney to help you with all of this. There is a lot of paperwork and the process is slow and complex.

