Source
A developer can apply a patch file to his/her project in a few simple steps.
1. Open the apply patch wizard: Right click on project >Team >Apply patch
2. Select the patch file and click next. Select the project to patch and click next.
3. In the next window you will be presented with a summary of the patch with files that will be touched. To apply the patch to the correct files: under Patch Options select Ignore leading path name segments until the matching files are found.
4. Check the files you want to apply the patch to and click finish.