It is probably easiest to download and install the Skype API https://developer.skype.com/Download.
Then you can simply add a reference to this wrapper from the COM tab of the Add References dialog in your Visual Studio project.
Below is a short sample program illustrating how to search for a user and how to send a message:
using System;
using SKYPE4COMLib;
class Program
{
static void Main(string[] args)
{
Skype skype = new Skype();
if (!skype.Client.IsRunning)
{
// start minimized with no splash screen
skype.Client.Start(true, true);
}
// wait for the client to be connected and ready
skype.Attach(6, true);
// access skype objects
Console.WriteLine("Missed message count: {0}", skype.MissedMessages.Count);
// do some stuff
Console.WriteLine("Enter a skype name to search for: ");
string username = Console.ReadLine();
foreach (User user in skype.SearchForUsers(username))
{
Console.WriteLine(user.FullName);
}
Console.WriteLine("Say hello to: ");
username = Console.ReadLine();
skype.SendMessage(username, "Hello World");
}
}
Hope this will help you.