ascx is the extension for user controls, Add a "Web User Control" to your project, then use the visual designer to design it like any other Asp.net page. Add code-behind when you have the UI ready. That means most of your code in RenderContents is redundant.

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See this thread about how to use forum markup codes for code blocks etc (present the problem/post properly )
Some useful links: Learning videoes, WMI Code Creator, MSDN, The Code Project, WindowsClient.net, ASP.net, W3 Schools, Regular-Expressions.info, GDI+ FAQ

DR. WEIR: Download it to a non-networked, firewalled computer.
TECHNICIAN: Yes, ma'am.