Programming an editable graphic in VB Forms Application

I have a request to build an element in a VB.net application using graphics. This is an area I am not familiar with and hoping someone can point me in a direction for research and coding examples.

The concept is a locked down graph with x and y axis and the allowing of a dot to be moved into the graph anywhere in the frame. It can be above or below, right or left of the axis lines, or dead center, or on any one line like below.



The location of the dot within the axis means something to the user.

Dot needs to be a consistent size which makes me wonder if I could drag and drop something I pre-define
I need to either store the graphic or maybe the coordinates in a database record
I need to be able to re-animate the graphic so the dot can be moved in an edit and saved again in the database

Been playing with an idea to stack radio buttons with hard drawn lines on a form to simulate the graph but user asking for overlapping radio buttons so dot can be on the line or touching the line. It is getting really complex.

Is there a control or something out there that can get me close to the requirements? Any direction or ideas would be appreciated.

Douglas

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