VS 2010 Resizing A Shape - How To Implement MinimumSize

I am creating a simple shape editor, much like the Visual Studio form designer. You can create shapes, select them and move/resize them using drag handles just like in Visual Studio or most other applications (Visio, etc).

I have run into some problems trying to implement a MinimumSize property for the shapes.First of all, this is how I'm resizing the shapes. Each shape has a Resize method, accepting two integers (dx and dy) that represent how much the shape must resize by, and one 'HitStatus', which determines in which direction the resize must take place (for example, from the TopLeft, or Bottom, or BottomRight, etc..)

What it does basically is use a large Select Case statement for the hit status. In each case, it changes the Bounds property of the shape (which determines the location and size), so that it is resized:

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