解决方法
您可以使用以下代码：
[DllImport("user32.dll")]
static extern bool SetWindowPos(
IntPtr hWnd,IntPtr hWndInsertAfter,int X,int Y,int cx,int cy,uint uFlags);
const UInt32 SWP_NOSIZE = 0x0001;
const UInt32 SWP_NOMOVE = 0x0002;
static readonly IntPtr HWND_BOTTOM = new IntPtr(1);
static void SendWpfWindowBack(Window window)
{
var hWnd = new WindowInteropHelper(window).Handle;
SetWindowPos(hWnd,HWND_BOTTOM,SWP_NOSIZE | SWP_NOMOVE);
}
资料来源：http://www.aeroxp.org/board/lofiversion/index.php?t4983.html
