C# WPF 让你的窗口始终钉在桌面上

            IntPtr hWnd = new WindowInteropHelper(Application.Current.MainWindow).Handle;
            IntPtr hWndProgMan = FindWindow("Progman", "Program Manager");
            SetParent(hWnd, hWndProgMan);

        [DllImport("user32.dll", SetLastError = true)]
        static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindow(string lpWindowClass, string lpWindowName);
        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);
        const int GWL_HWNDPARENT = -8;
        [DllImport("user32.dll")]
        static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

 var handle = new WindowInteropHelper(Application.Current.MainWindow).Handle;
            IntPtr hprog = FindWindowEx(
                FindWindowEx(
                    FindWindow("Progman", "Program Manager"),
                    IntPtr.Zero, "SHELLDLL_DefView", ""
                ),
                IntPtr.Zero, "SysListView32", "FolderView"
            );
            SetWindowLong(handle, GWL_HWNDPARENT, hprog);