LiveUpdates app with Visual C++ or C#

Question

Hi. My name is Roxanne and I am a C++ / C# programmer. In the company that I’m working at, we are programming a business program for the customers and the software have been done in Visual C++ 6.0 I have to create and add to the software a new feature pretty similar to: (LiveUpdates from Norton antivirus or another software that check for softwares updates through the internet), to let the customers get the new software’s updates. Can anyone help me out with some ideas of how to do it? If somebody can help with some ideas or examples codes I’d appreciate it. Thanks Roxanne