write update module in c++

write update module in c++

We are developing an application in c++ language in Microsoft visual
studio 2012 for windows 7 64bit environment. We want to add an update
module for our application (software and database version update like an
antivirus via internet). So We researched on methods for developing this
module and found out that We can use either Server/Client or Web Service
method. still there are some Questions:
Is there any other method than Server/Client and Web Service?
What is different between these methods?
Which one is better for Us?
Is there any useful toolkit or framework for rapid and secure development
of our update module by these methods?
Thanks