Button linking to print dialog form

I am very new to the C# programming and is using Visual Studio 2008 Currently, i am building an application with the following function and i am facing a alot of difficulties. 1. I need help , my application would allow the user to input the email and password, it will allow them to access to the contact list of that particular account. How do i implement the function into the application? Can someone kindly guide me along. 2. Next will a button that upon clicking will show the printer dialog form allow the user to access to the print straight. Thanks in advance to those able to guide me along for the project