golandsh

I have a MSChart control wich shows four categories show as 2DBars or 2DLine.
The categories shown in red,blue,green,yellow bars.
what i want to do is by clicking a command button for example, to hide one of the bars, the blue for example without losing its data so i can return it later by clicking on another command button.
I only succeeded in hiding them in Design time (Not useful), but not in Run time.
How can i do it.
I have it described in images and can send it by email to anyone willing to help.
I want to thank for anyone who can assist me int this or tried.

I have attached a zip file wich contains a form wich has images in it describing what i want to do.
I hope it will help you understand what I want to do.