How to move Window by Drag Child Win32 Window In WPF

hello,everybody.
In a WPF window( parent ), the client area is a win32 window(child) by use
HWndHost. now the WPF window has no caption and want to move the window by
drag the child win32 window. I can't simply use DragMove when receive win32
Window's mousedown message, the system throw exception for mouse is not down.
Now what can I do? can i simulate the mouse down in wpf window?
thanks for any help.

To handle mouse input for the HwndHost, use hwnd-based APIs like
wm_mousemove.


--
-Nick Kramer [MSFT]
http://blogs.msdn.com/nickkramer

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"How to Draw Caption Button In WPF"
<HowtoDrawCaptionButtonInWPF@discussions.microsoft.com> wrote in message
news:BB529F7A-FCBF-4242-854F-0528A134E285@microsoft.com...
> hello,everybody.
> In a WPF window( parent ), the client area is a win32 window(child) by use
> HWndHost. now the WPF window has no caption and want to move the window
> by
> drag the child win32 window. I can't simply use DragMove when receive
> win32
> Window's mousedown message, the system throw exception for mouse is not
> down.
> Now what can I do? can i simulate the mouse down in wpf window?
> thanks for any help.
>
>