Docking Manger stop working in v3.0

[Administrator]

After I upgrated from v2.0 to v3.0, the docking window, sliding window stops working. I unpin the window and it hides away, however, hoverring over the label doesn''t make the windwo slide out.

Everything was working before I upgrade to v3.0.
Is there any where I can put breakpoint in the syncfusion code to see why it stops working?

[Administrator]

I traced the AHTabControl.cs file, OnMouseMove Handler. I find out that

if((mainForm != null) && (IsFocused(mainForm))
{
showAutoHideControl = true;
}

is never excuted in my application. My application''s top most control is not a native .NET control. I embedded the all my syncfusion controls inside a usercontrol and than embedded the user control into an ActiveX control, etc...

So, I am wondering if there is any workaround to this issue.

When I comment out the above code and make showAutoHideControl always true, than the slidding window is visible when I place the mouse over the label.