Look at Microsoft's Component UI Application Block

http://msdn.microsoft.com/en-us/library/cc540687.aspx

>I am designing an app that looks something like this: http://www.componentfactory.com/windows-forms-tabcontrol.php
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>The area under "Family" will contain various types of lists of data, and possibly other controls. To facilitate this I am creating Panes with the grids or controls on them that I want to display, which is determined by what the user clicks on the left side. When the user clicks an item in the left side area, I will remove the current pane and add the selected pane, then load it with any data required.
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>When the user takes action in the top pane, I want to load the lower pane, so again, remove the lower pane, add the selected pane.
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>The question is this... How do I manage all of this, meaning, the panes have to be able to commicate with the form, which I could do via an event, but how do I code this if the controls are being added/removed at runtime?