How To Use Partial Caching With Dynamically Created Controls

I have a control declared with PartialCaching attribute, like this:

[PartialCaching(60 * 60 * 12)]
public class MyControl : Control {
// control contents ...
}

but I create it in code, using new keyword. The problem is that if the control is in cache I must not create the control again the next time, but I need to add the control to the page hierarchy, otherwise nothing is going to be rendered. What I need in pseudo-code is something like this:

if (myControlIsCached) {
var ctl = ???; // something that represents the cached control
// e.g. could be: new LiteralControl( myControlCachedData ) [code].....