How could I use draw Image to paint window?

[kofight]

I want to draw some content in a window by Image.draw().

It contains some animation, and maybe a little complicate. So I don't think use staticImage control is a good way.

I can't draw image on the window, it just draw above the window.

I mean that all the child window is covered.

How could I draw a Image only on the window, below the child window?

I try to override some method.

virtual void onRenderingStarted(WindowEventArgs& e);
virtual void drawSelf(float z);
virtual void populateRenderCache() {}

The result is same.

[kofight]

Could some one help me?

Did I express it clearly?

I only want do the same things like MFC's OnPaint().