Call PerformancePoint charts in custom asp.net control programmatically

How can i call a performancepoint chart(designed in dashboard designer) in custom asp.net user control programmatically from the performance point content library. I have successfully designed dashboards using dashboard designer, but now i need to call performancepoint charts (from the performancepoint library) in my custom asp.net control. I can't find any help on this. Any guidance would be greatly appreciated as I am stuck at this position.