That's still not enough information. Are you doing an inland application or outland? Meaning, did you send your forms to Vegreville or Mississauga? If you're doing an outland application, what is your visa office? What country do you come from?
If you applied inland, then you can expect to hear from CIC about 5-6 months after sending the application. My guess would be you applied outland though, since you heard from them so soon. If that is the case, then it largely depends on the visa office that will be processing your app.