I Shanti Swarup Tunga , having good knowledge in C programming want to work in your project . So kindly suggest me some prerequisite knowledge to apply for your project.
You'd need to be knowledgeable about the win32 api, and potentially others depending on the project. You'll need to either pick or propose a project (the latter is preferred). You can search https://bugs.winehq.org for bugs that interest you.