C# Windows Forms Interacting With Web Browser

I have developed a Windows Form application in C# that interacts with a phone system.

I would like to add click to dial functionality to the application.

When I click on a telephone number in a web browser I would like to copy the telephone number into a string and execute some code in my Windows Form application.

I have looked into using Selenium but it seems that the user must be using an instance of Chrome that Selenium has created to complete the above task.

Any help would be appreciated.

Thanks in advance!