If you think that the application will work just like a web application, I see no reason for this in the forms. As for the schedule, Flash Builder has a built-in graphical interface if you want to go this route. For Silverlight, there is ToolKit and a number of third-party vendors such as Telerik. Both platforms will do what you need.
If you already know .NET, then the solution should be no problem, use Silverlight.
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