C# Visual Studio 2005 or 2008 code editor event handler

Question

Hi! I need to develop an add-in Visual Studio. I find many helps to the add-in making. The task is paste a custom simbol or character in the Studio's code editor (It's done), and handle the onClick and the onMouseMove events on it(this is what I need). I can't find in this time the solution this problem. I would like ask: How can I acces the events of the code editor? Or if you had an other solution expedient please help me. Sorry about my englis. Thanks.