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.