AutomationElement pinvoke right click

gistfile1.cs

// add references WindowsBase, UIAutomationClient, UIAutomationTypes
// using System.Windows.Automation; 
// using System.Windows;
[DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);		
public void RightClick(AutomationElement element)
{
	const int WM_LBUTTONDOWN	= 0x0201;
	const int WM_LBUTTONUP		= 0x0202;

	Point point = element.GetClickablePoint();
	object processId = element.GetCurrentPropertyValue(AutomationElement.ProcessIdProperty);
	AutomationElement window = AutomationElement.RootElement.FindFirst(TreeScope.Children,new PropertyCondition(AutomationElement.ProcessIdProperty, processId));
	Int32 hWnd = window.Current.NativeWindowHandle;
	double x = point.X;
	double y = point.Y;
	Int32 value = ((int)x)<<16 + (int)y;
	SendMessage(new IntPtr(hWnd), WM_LBUTTONDOWN, IntPtr.Zero, new IntPtr(value));
	SendMessage(new IntPtr(hWnd), WM_LBUTTONUP, IntPtr.Zero, new IntPtr(value));
}