I'm trying to create a custom control by deriving from a ZedGraphControl
I need to add a ProgressBar to the control, but I encountered some problems.

When I create a custom control and add both, ZedGraphCOntrol and ProgressBar to it, everything is OK:

MyCustomControl
{
    ZedGraphControl
    ProgressBar
}

All elemnets are visible and working as expected.

But I need to derive from ZGC and when I add a progress bar as a subcontrol of ZedGraphControl:

MyCustomControl : ZedGRaphControl
{
   ProgressBar
}

The progress bar is not visible.

Is there any way to force the visibility of ProgressBar? Is it possible, that ZedGraphControl is not displaying its subcontrols? I tried do the same thing with a simple button and it's also not being displayed.