App Bar notification messages

Someone must know the answer to this problem...

I am using SHAppBarMessage to give my app docking capabilities.
But if I dock my window on the bottom of the screen and then move the taskbar to the top for example, my window stays in it's position, and it looks like it's floating.
Anyone know how I can receive notification messages from the system about the position of my AppBar?

[Joacim Andersson]

Are you using the ABM_SETPOS message when your moving the form? In that case the rc argument of the APPBARDATA structure contains the approved bounding rectangle to use when the function returns.

That's not the problem.
After I initialize the appbar, I don't know when, for example, the user moves or resizes the taskbar, or moves another appbar to the same edge as my app bar. Is there a way to track those and to move my appbar accordingly?

Any suggestion? Please? I've tried everything!